GX-3R Operating Manual (PT0-164) · 1) RP-3R Pump unit Operating Manual (PT0E-166) 2) SW-GX-3R Data Logger Management Program Software Operating Manual (PT0E-178) 3) SDM-3R Docking

PT0E-17612

Portable Gas Monitor

GX-3R Operating Manual

(PT0-164)

2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744, Japan

Phone : +81-3-3966-1113 Fax : +81-3-3558-9110 E-mail : [email protected] Web site : https://www.rikenkeiki.co.jp/

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Contents 1 Product Overview ............................................................................................................................................ 4

1-1. Introduction ............................................................................................................................................ 4 1-2. Intended use .......................................................................................................................................... 4 1-3. DANGER, WARNING, CAUTION, and NOTE ....................................................................................... 6 1-4. Checking standards and explosion-proof specifications ....................................................................... 6

2 Important Safety Information ......................................................................................................................... 7 2-1. Danger information ................................................................................................................................ 7 2-2. Warning information ............................................................................................................................... 8 2-3. Caution information ................................................................................................................................ 9 2-4. Safety information ................................................................................................................................ 11

3 Product Configuration.................................................................................................................................. 14 3-1. Main unit and standard accessories .................................................................................................... 14

Main unit .............................................................................................................................................. 14 Standard accessories .......................................................................................................................... 15

3-2. Part names and functions .................................................................................................................... 16 Main unit .............................................................................................................................................. 16 LCD display ......................................................................................................................................... 17

4 Alarm Activation ........................................................................................................................................... 18 4-1. Gas alarm activation ............................................................................................................................ 18 4-2. Fault alarm activation ........................................................................................................................... 20

5 Usage Instructions ....................................................................................................................................... 21 5-1. Before using the product ...................................................................................................................... 21 5-2. Preparing startup ................................................................................................................................. 21

5-2-1. Charging the lithium ion battery ................................................................................................ 21 5-3. Startup .................................................................................................................................................. 23

Turning on the power .......................................................................................................................... 23 Screen transition from powering on to displaying measurement screen ........................................... 24

5-4. Air calibration ........................................................................................................................................ 27 Air calibration procedure ..................................................................................................................... 27

5-5. Gas detection ....................................................................................................................................... 28 5-5-1. Basic operating procedures ...................................................................................................... 28 5-5-2. Measurement mode .................................................................................................................. 29

5-6. Turning off the power ........................................................................................................................... 31 6 Setting Procedure ........................................................................................................................................ 32

6-1. Display mode ....................................................................................................................................... 32 6-1-1. Displaying display mode ........................................................................................................... 32 6-1-2. Display mode display details .................................................................................................... 32

6-2. Display mode settings .......................................................................................................................... 34 6-2-1. Clearing PEAK value display .................................................................................................... 34 6-2-2. Combustible conversion gas selection ..................................................................................... 35 6-2-3. Long-life battery setting ............................................................................................................ 37 6-2-4. Calibration data display ............................................................................................................ 38 6-2-5. Bump data display .................................................................................................................... 39 6-2-5. Alarm setpoint display ............................................................................................................... 40

6-3. User mode ............................................................................................................................................ 41 6-3-1. Displaying user mode ............................................................................................................... 41 6-3-2. User mode settings ................................................................................................................... 42

6-4. User mode settings .............................................................................................................................. 44 6-4-1. Bump test .................................................................................................................................. 44 6-4-2. Calibration ................................................................................................................................. 44 6-4-3. Calibration expiration date setting ............................................................................................ 44 6-4-4. Bump test setting ...................................................................................................................... 47 6-4-5. Alarm setpoint setting ............................................................................................................... 52

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6-4-6. Lunch break: ON/OFF .............................................................................................................. 54 6-4-7. Confirmation beep setting ........................................................................................................ 55 6-4-8. LCD lighting time setting .......................................................................................................... 57 6-4-9. Key tone: ON/OFF .................................................................................................................... 57 6-4-10. Display mode item display: ON/OFF ...................................................................................... 58 6-4-11. Date and time setting .............................................................................................................. 58 6-4-12. User password setting ............................................................................................................ 59 6-4-13. ROM/SUM display .................................................................................................................. 60

7 Maintenance ................................................................................................................................................ 61 7-1. Maintenance intervals and maintenance items ................................................................................... 61

Maintenance service ........................................................................................................................... 62 7-2. Calibration ............................................................................................................................................ 63

7-2-1. Preparation for calibration ........................................................................................................ 63 7-2-2. Calibration setting menu ........................................................................................................... 65 7-2-3. Air calibration ............................................................................................................................ 66 7-2-4. Auto calibration ......................................................................................................................... 67 7-2-5. Switch from AUTO calibration to measurement start screen ................................................... 69 7-2-6. Auto calibration cylinder setting ................................................................................................ 70 7-2-7. Auto calibration gas concentration selection ............................................................................ 71

7-3. Bump test ............................................................................................................................................. 72 7-3-1. Perform bump test (BUMP TEST) .................................................................................................... 72 7-3-2. Switching from bump test (BUMP TEST) to measurement start screen .......................................... 73 7-4. Cleaning instructions ............................................................................................................................ 74 7-5. Parts replacement ................................................................................................................................ 75

7-5-1. Periodic replacement parts ....................................................................................................... 75 7-5-2. Filter replacement ..................................................................................................................... 76

8 Storage and Disposal .................................................................................................................................. 79 8-1. Procedures for storage or when not in use for extended periods ....................................................... 79 8-2. Procedures for use after storage ......................................................................................................... 79 8-3. Product disposal................................................................................................................................... 80

9 Troubleshooting ........................................................................................................................................... 81 9-1. Product abnormalities .......................................................................................................................... 81 9-2. Reading abnormalities ......................................................................................................................... 83

10 Product Specifications ................................................................................................................................. 84 10-1. Specifications list ............................................................................................................................... 84 10-2. Accessory list ..................................................................................................................................... 87

11 Appendix ...................................................................................................................................................... 88 Data logger function .................................................................................................................................... 88 100 %LEL = ppm conversion list ................................................................................................................. 90 Revision or Abolition History ....................................................................................................................... 91

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1

1 Product Overview

1-1. Introduction Thank you for your purchase of the GX-3R Portable Gas Monitor (“product” hereinafter). First, please confirm that the model number of the product you purchased matches the model number of the product covered by this manual. The product should be used only by fully-trained personnel. Maintenance procedures described in this manual should be performed only by fully-trained personnel. Any maintenance procedure not described in this manual must be performed by Riken Keiki or our certified service engineers. Please contact Riken Keiki. This manual describes how to use the product and provides product specifications. Make sure you have read and fully understood the contents of this manual before using the product. This applies both to first-time users and those who have previously used the product. Keep this manual in a safe place for future reference. The contents of this manual are subject to change without notice to allow product improvements. Any duplication or reproduction of this manual without permission is prohibited, whether in whole or in part. In addition to this manual, manuals are also provided for optional products (sold separately). Refer to the following manuals along with this manual when using optional products (sold separately):

1) RP-3R Pump unit Operating Manual (PT0E-166) 2) SW-GX-3R Data Logger Management Program Software Operating Manual (PT0E-178) 3) SDM-3R Docking Station Operating Manual (PT0E-167)

Regardless of the warranty period, Riken Keiki does not accept any liability for accidents or damage resulting from use of the product. Be sure to read the warranty policy set forth on the warranty.

1-2. Intended use The product is a multi-gas monitor equipped with up to three types of sensors to enable detection of four different gas types using a single unit. The product comes in several different types, depending on the combinations of detection target gases. Check the specifications before use to confirm the correct gases will be detected in accordance with the intended purpose. The product is a gas detector designed to measure the concentrations of chemicals in the air in working environments. It measures concentrations of toxic gases, combustible gases, and oxygen in the air and issues an alarm if concentrations exceed preset levels, thereby alerting users to the hazards of gas poisoning and oxygen deficiency.

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<List of detection target gases (installed sensor models) by type>

TYPE

Detection target gases (installed sensor models) Combustible

gas <HC or CH4> (NCR-6309)

Oxygen (ESR-X13P)

Carbon monoxide/hydrogen

sulfide (ESR-A1DP)

Hydrogen sulfide

(ESR-A13i)

Carbon monoxide

(ESR-A13P)

Carbon monoxide

(ESR-A1CP)*

TYPE A TYPE B TYPE C

TYPE CH TYPE D TYPE E TYPE F

TYPE FH TYPE G TYPE I

TYPE IH TYPE K TYPE L TYPE M

* The carbon monoxide sensor (ESR-A1CP) includes a correction function to reduce interference due to

hydrogen. This function works for hydrogen concentrations up to 2,000 ppm.

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1-3. DANGER, WARNING, CAUTION, and NOTE This manual uses the following headings to ensure safe and effective work:

DANGER This indicates situations in which improper handling may result in fatal or serious injury to persons or serious damage to property.

WARNING This indicates situations in which improper handling may result in serious injury to persons or serious damage to property.

CAUTION This indicates situations in which improper handling may result in minor injury to persons or minor damage to property.

NOTE This indicates handling tips.

1-4. Checking standards and explosion-proof specifications

The product specifications will vary depending on the specific standards and explosion-proof certification. Check the actual product specifications before use. For CE marking models, refer to the “Declaration of Conformity” in the Appendix.

Check the affixed nameplate for product specifications.

ATEX/IECEx,CE marking type name plate Japan Ex type name plate

Ex marking CE marking

Type examination certificate marking

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2

2 Important Safety Information

To maintain the performance of the product and to ensure safe use, always observe the following DANGER, WARNING, and CAUTION instructions.

2-1. Danger information

DANGER Explosion-proofing Do not modify or alter the circuitry or configuration. When measuring oxygen concentrations, do not measure anything

but mixtures of air and combustible or toxic gases. When using the product in hazardous areas, take the following

precautions to safeguard against static electricity hazards: ① Wear anti-static clothing and conductive shoes (anti-static work shoes). ② When using the product indoors, stand on a conductive work floor

(with a leakage resistance of 10 MΩ or less). The ratings are as follows:

Power supply: Battery pack (BP-3R): 3.7 V DC, 200 mA Battery charging contact allowable voltage: 6.3 V DC (with SELV power supply only)

Ambient temperature: -40 °C to +60 °C (Ambient temperature refers to the temperature range in which the explosion-proof performance can be maintained. It does not refer to the temperature range in which product performance is guaranteed. For the range of operating temperatures, see “10-1. Specifications list”.)

Usage If measuring inside manholes or enclosed spaces, never lean over or look into the manhole or

enclosed space. There is a danger that oxygen-deficient air or other gases may be discharged from such locations.

Main unit

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2-2. Warning information

WARNING If an abnormality is discovered in the product If an abnormality is discovered in the product, contact Riken Keiki immediately. Visit our website

for information on the nearest Riken Keiki office. Website: https://www.rikenkeiki.co.jp/

Sensor handling Never attempt to disassemble the electrochemical type sensor inside the product. Electrolyte

contained inside may cause inflammation if it comes into contact with the skin. There is also a risk of blindness if it comes into contact with the eyes. Electrolyte may discolor or decompose clothing if it comes into contact with clothing. If contact occurs, rinse the area immediately with plenty of water. Do not use any gas other than nitrogen as the balance gas when calibrating or adjusting an oxygen sensor.

Fresh air adjustment in the atmosphere When fresh air adjustment is performed in the atmosphere, check the atmosphere for freshness

before starting. The presence of interference gases will make it impossible to adjust the product correctly, resulting in the danger of erroneous detection when actual gas leaks occur.

Action when a gas alarm occurs When a gas alarm occurs, this indicates an extremely dangerous situation. The user must take

appropriate action after taking steps to ensure safety. Battery level check Check the battery level before using the product. The battery may be depleted when the product is

used for the first time or after extended periods without use. Charge the battery before use. If a low battery voltage alarm occurs, gas cannot be detected. If the alarm is issued during use,

turn off the power and promptly charge the battery in a safe place. Miscellaneous Gas cannot be detected if the sensor is covered with water such as rainwater. Do not use the

product in rain or submerge it in water. When wearing the product, make sure that it is exposed to the air. If it is covered or blocked,

correct measurement cannot be obtained, possibly resulting in accidents. Do not dispose of the product into fire. Do not attempt to wash the product, either in a washing machine or an ultrasonic cleaning

machine. Do not block the buzzer sound opening. Doing so will muffle or silence the audible warning. The product is a personal gas monitor to be worn on the body. Therefore, before using the product

in a confined space, suspend it with a separately prepared rope, tie it to the end of a rod or connect the suction pump unit RP-3R (sold separately) to detect the atmosphere from the outside of the confined space to confirm safety in advance.

While conducting measurement in a confined space, do not lean over or look into the closed space. It may lead to dangers because oxygen-deficient air or other gases may blow out.

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2-3. Caution information

CAUTION Do not use the product in locations where it may be exposed to oil or chemicals, etc.

‧ Avoid using the product in locations where the product may be splashed with liquids such as oil and chemicals.

‧ Do not place the product in locations where water or dirt accumulates. Placing the product in such locations may cause malfunction due to water or dirt ingress into the buzzer sound opening, etc.

Do not use the product in locations where the temperature exceeds the range of operating temperatures. ‧ The operating temperature range for the product is as follows. Avoid using the product at

temperatures outside the operating range. Continuous use environment: -20 °C to +50 °C Temporary use environment: -40 °C to +60 °C ‧ Avoid using the product for extended periods in locations where it is exposed to direct sunlight. ‧ Avoid storing the product inside parked vehicles in hot weather.

Adhere to the operating humidity range to prevent condensation forming inside the product. Condensation forming inside the product may cause clogging or gas adsorption, which may prevent accurate gas detection. Condensation must be avoided at all costs. In addition to the usage environment, carefully monitor the temperature and humidity of the sampling point to prevent condensation forming inside the product.

Do not use walkie-talkies near the product. ‧ Radio waves from walkie-talkies or other radio wave transmitting devices near the product

may affect readings. If walkie-talkies or other radio wave transmitting devices are used, these must be used away from the product where they do not affect operation.

‧ Do not use the product near devices that emit strong electromagnetic radiation (high-frequency or high-voltage devices).

Verify that the operation status display is blinking before using the product. If the operation status display is not blinking, gas cannot be detected properly.

Sensors

・ Note that if combustible gas sensors are used in an environment where silicone compounds, halides, high concentrations of sulfides, or high concentrations of solvent gases are present, the sensor life may be reduced, sensitivity to combustible gases may deteriorate, and accurate readings may not be obtained. If use in such environments is unavoidable, use for the shortest possible time and allow the product to stand in fresh air after use. Confirm that the reading returns to normal and is stabilized.

・ An oxygen concentration higher than a certain level is required in order for the combustible gas sensor <%LEL> in the product to correctly detect gases and display concentrations.

・ Do not expose the product to sudden pressure fluctuations. Oxygen readings will vary temporarily, preventing accurate measurement.

・ Do not use any gas other than nitrogen as the balance gas when calibrating or adjusting an oxygen sensor. Otherwise, oxygen reading errors will increase, preventing accurate measurement.

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CAUTION Be sure to perform regular maintenance.

The product must be maintained regularly to ensure safety. Continuing to use the product without maintaining it will result in sensor sensitivity variations, preventing accurate gas detection.

Miscellaneous ‧ Pressing buttons unnecessarily may change the settings, preventing alarms from activating

correctly. Avoid performing any operations not described in this operating manual. ‧ Do not drop the product or subject it to impact. Doing so may degrade explosion-proof,

waterproof, dustproof, and gas detection performance. ‧ Do not use the product while charging it.

Do not poke the buzzer sound opening or sensor openings with sharp-pointed items. Doing so may result in ingress of water or foreign matter, resulting in malfunctions or damage to the product.

Do not block the buzzer sound opening with tape or other objects. This will prevent adjustment of the internal pressure of the product, which may result in malfunctions.

Do not remove the panel sheet on the LCD display. Doing so will impair waterproof and dustproof performance.

Do not cover the infrared port with labels or other objects. This will prevent infrared communication.

Usage ‧ The operating time will be reduced due to battery performance in cold environments. ‧ The response of the LCD display may slow at low temperatures. ‧ Always perform air calibration under conditions of pressure, temperature, and humidity similar to

those in the operating environment and in fresh air. ‧ Wait for the readout to stabilize before performing air calibration. ‧ If there is a temperature difference of 15 °C or more between the storage and usage locations,

turn on the power and allow the product to stand and acclimatize for about 10 minutes in an environment similar to the usage location before performing air calibration in fresh air.

‧ When wiping the product clean, do not splash water on it or use organic solvents like alcohol and benzine. Doing so may discolor or damage the surfaces of the product.

‧ After a period of extended storage, be sure to perform calibration before resuming use. For information on readjustment including calibration, please contact Riken Keiki.

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2-4. Safety information Necessaryy information for explosion proof construction of Model GX-3R. Overview The GX-3R can measure up to 4 gases using 3 sensors. The GX-3R measures the combustible gases (LEL), oxygen (O2), hydrogen sulfide (H2S), and carbon monoxide (CO). This model displays measurement results on an LCD and issue gas alarms (via LED and buzzer) as needed. Gas sampling is by diffusion. The model does not have internal suction pumps. Power sources The GX-3R draws power from an integrated rechargeable Li-ion battery that is not user-replaceable. A dedicated AC adapter is used for recharging the Li-ion battery. <ATEX/IECEx specification> Explosion proof structure

Intrinsically safe explosion-proof construction and flame-proof enclosures

Specification for safety Ex da ia I Ma , Ex da ia IIC T4 Ga (with combustible gas sensor NCR-6309) Ex ia I Ma , Ex ia IIC T4 Ga (without combustible gas sensor NCR-6309)

Ambient temperature range

-40°C to +60°C

Ambient temperature range (for charging)

0°C to +40°C

Electrical data ・ Lithium-ion battery: Maxell rechargeable battery model no. ICP463048XS ・ The battery should be charged with the dedicated AC adapter or by power

from a IEC60950-certified SELV power source, or IEC62368-1-certified ES1 power source. The maximum voltage from the charger shall not exceed 6.3Vdc.

Certificate numbers ・ IECEx : IECEx DEK 17.0050 X ・ ATEX : DEKRA 17 ATEX 0103 X

List of standards ・ IEC 60079-0:2017 ・ IEC 60079-1:2014-06 ・ IEC 60079-11:2011

・ EN IEC 60079-0:2018 ・ EN60079-1:2014 ・ EN60079-11:2012 ・ EN50303:2000

I M1 Ex da ia I Ma, II 1 G Ex da ia IIC T4 Ga (with combustible gas sensor NCR-6309) I M1 Ex ia I Ma, II 1 G Ex ia IIC T4 Ga (without combustible gas sensor NCR-6309)

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WARNING Do not attempt to disassemble or modify the instrument. The combustible gas sensor NCR-6309, to measure LEL, is the only part of this Gas Monitor system

with flame - proof construction. This product is an explosion-proof product and is not to be disassembled or modified with the

exception of specified parts. NCR-6309 must not be exposed to ultraviolet light. This product integrates a sensor having flameproof construction. If assembly is not performed as

specified, explosion protection performance will be compromised. When replacing the sensor and filter, properly install genuine parts and torque to specification.

If the enclosure is damaged it shall be repaired before further use. The Sensor shall not be exposed to ultraviolet light or used in equipment in which it is not fully

enclosed. Do not charge in a hazardous location. Do not charge the unit with a non-genuine charger. Group I Additional Specific Condition Do not give strong force or shock to NCR - 6309. There is a danger that the flame - proof

performance will be damaged due to breakage etc. This sensor uses flame-proof conditions of "low" possibility of mechanical damage.

The enclosures shall be protected against exposure to hydraulic liquids, oil or grease.

Sensor cover

Sensor cap

Location of screws for performing replacement

Tightening specification: At least 10 N･cm

NCR-6309

Maximum sensor surface temperature 82.6°C

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Instruments No.

INST. No. 00 0 000 0000 00

A B C D E

A: Year of manufacture (0 to 9) B: Month of manufacture (1 to 9 for Jan.-Sep.; XYZ for Oct., Nov., Dec.) C: Manufacturing lot D: Serial number E: Factory codes

<Japan Ex specification> Explosion proof structure Intrinsically safe explosion-proof construction Explosion proof class Ex ia IIC T4 Ga Ambient temperature range* -40°C to +60°C Ambient temperature range (for charging)

0°C to +40°C

Rating Power supply: Battery pack (BP-3R): 3.7 V DC, 200 mA Battery charging contact allowable voltage: 6.3 V DC (with SELV power supply only)

Lists of standards JNIOSH-TR-46-1：2015 JNIOSH-TR-46-6：2015

* Ambient temperature refers to the temperature range in which the explosion-proof performance can be maintained. It does not refer to the temperature range in which product performance is guaranteed. For the range of operating temperatures, see “10-1. Specifications list”

2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744, JapanPhone: +81-3-3966-1113

Fax: +81-3-3558-9110 E-mail: [email protected]

Website: https://www.rikenkeiki.co.jp

WARNING Do not modify or alter the circuitry or configuration. When measuring oxygen concentrations, do not measure anything

but mixtures of air and combustible or toxic gases. When using the product in hazardous areas, take the following

precautions to safeguard against static electricity hazards: ① Wear anti-static clothing and conductive shoes (anti-static work shoes). ② When using the product indoors, stand on a conductive work floor

(with a leakage resistance of 10 MΩ or less).

DANGER Charge the battery using the provided charger in a safe place. Charge the battery at ambient temperatures between 0 °C and 40 °C.

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3

3 Product Configuration

3-1. Main unit and standard accessories Open the box and packaging and inspect the product and accessories. If anything is missing, contact Riken Keiki.

Main unit For detailed information on the names and functions of product parts and the LCD display, see “3-2. Part names and functions” on page 16.

GX-3R main unit

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Standard accessories AC adapter ×1

Rubber protection cover ×1 Protects the product from impact if it is hit by something or dropped.

Alligator clip ×1 Allows attaching the product to a pocket. * ATEX/IECEx specification only

Calibration adapter (simple type) ×1 Used to perform gas calibration and bump test. * ATEX/IECEx specification only

Hand strap ×1

Belt clip ×1 Attaches the product to a belt. * Japan Ex specification

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3-2. Part names and functions This section describes the names and functions of the various parts of the main unit and the LCD display.

Main unit

Name Main function

(1) LCD display Displays information such as gas type and gas concentration.

(2) POWER/MODE button Turns the power on and off. This button is also used to confirm settings in setting mode.

(3) AIR button Performs air calibration in measurement mode. This button is also used to select settings in setting mode.

(4) Alarm LED arrays The lamps flash red when an alarm occurs.

(5) Infrared communication port

This is used for data communication with a PC when using a data logger management program.

(6) Buzzer sound opening Emits operating and alarm sounds. (Do not block.)

(7) Battery charging contact Contact for connecting the charger (EPU15-102-L6)

(8) Sensors Sensors are installed for detecting individual gases.

CAUTION Do not poke the buzzer sound opening or sensor openings with sharp-pointed items. Doing so

may result in ingress of water or foreign matter, resulting in malfunctions or damage to the product. Do not remove the panel sheet on the LCD display. Doing so will impair waterproof and dustproof

performance. Do not cover the infrared communication port with labels or stickers. This will prevent infrared

communication. Do not block the buzzer sound opening with tape or other objects. This will prevent adjustment of

the internal pressure of the product, which may result in malfunctions.

(4), (5)

(1)

(4)

(3)

(6)

(2)

(8)

(7)

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NOTE In this operating manual, buttons that have multiple functions are described as follows in the

operational procedures: Example: “POWER/MODE button” is described as follows: POWER button when turning the power on and off MODE button when confirming settings

LCD display

Name Main function

(1) Operation status display

Indicates the operation status. Blinks when normal.

(2) Clock display Displays the time.

(3) Combustible gas concentration Displays gas concentrations as numerical readouts.

The concentration readout is updated every second for sensors other than the combustible gas sensor. The combustible gas concentration readout is updated every five seconds (every 15 seconds for long-life battery operation).

(4) Oxygen concentration

(5) Carbon monoxide concentration

(6) Hydrogen sulfide concentration

(7) Battery level icon Indicates battery levels. See NOTE below for a guide to battery level indications.

NOTE Approximate battery levels are indicated as follows:

Sufficient Low Needs charging.

The battery icon will blink if battery levels drop even further. If the bump test expiration date display setting is enabled, “✔ is

displayed in the upper left of the LCD until the bump test expiration date. For more information on the bump test expiration date display setting, see “6-4-3. Calibration expiration date setting” on page 44.

If the long-life battery function is enabled, “L” is displayed in the upper left of the LCD.

“M” is displayed in the upper left of the LCD when user mode is selected.

(1)

(3)

(5)

(7)

(2)

(4)

(6)

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4

4 Alarm Activation

4-1. Gas alarm activation <Alarm types> A “gas alarm” is triggered if the concentration of the detected gas reaches or exceeds the alarm setpoints shown in the following table. (Self-latching) Gas alarm types include the first alarm (WARNING), second alarm (ALARM), third alarm (ALARM H), TWA alarm, STEL alarm, OVER alarm (over scale), and M OVER alarm (minus sensor failure).

Gas alarms are prioritized as follows:

First alarm < second alarm < third alarm < M OVER alarm < OVER alarm < integrated alarm point < TWA alarm < STEL alarm

<Default settings>

Item Measured

gas Combustible gas

O2 CO H2S HC or CH4

Measurement range

0 to 100 %LEL 0 to 25 % 0 to 500 ppm 0 to 30 ppm

Service range - 25 to 40 % 500 to 2,000 ppm 30 to 200 ppm

Minimum resolution

1 %LEL 0.1 % 1 ppm 0.1 ppm

Alarm setpoint (General ATEX/IECEx specification)

1st alarm: 10 %LEL 2nd alarm: 25 %LEL 3rd alarm: 50 %LEL OVER alarm: 100 %LEL MOVER alarm：-10%LEL

L: 19.5 % LL: 18.0 % H: 23.5 % OVER alarm:40.0% MOVER alarm：-1.0vol%

1st alarm: 25 ppm 2nd alarm: 50 ppm 3rd alarm: 1,200 ppm TWA alarm: 25 ppm STEL alarm: 200 ppm OVER alarm:2,000 ppm MOVER alarm：-50ppm

1st alarm: 5.0 ppm 2nd alarm: 30.0 ppm 3rd alarm: 100.0 ppm TWA alarm: 1.0 ppm STEL alarm: 5.0 ppm OVER alarm: 200.0 ppm MOVER alarm：-10.0ppm

Alarm setpoint (Japan Ex specification)

1st alarm: 10 %LEL 2nd alarm: 50 %LEL 3rd alarm: 50 %LEL OVER alarm: 100 %LEL MOVER alarm：-10%LEL

L: 18.0 % LL: 18.0 % H: 25.0 % OVER alarm:40.0 % MOVER alarm：-1.0vol%

1st alarm: 25 ppm 2nd alarm: 50 ppm 3rd alarm: 50 ppm TWA alarm: 25 ppm STEL alarm: 200 ppm OVER alarm:2,000 ppm MOVER alarm：-50ppm

1st alarm: 1.0 ppm 2nd alarm: 10.0 ppm 3rd alarm: 10.0 ppm TWA alarm: 1.0 ppm STEL alarm: 5.0 ppm OVER alarm: 200.0 ppm MOVER alarm：-10.0ppm

NOTE The default settings are as described in the table above. The alarm setpoints indicated for the first alarm (WARNING), second alarm (ALARM), third alarm

(ALARM H), TWA alarm, and STEL alarm in the table above can be changed. For information on how to change the alarm setpoints, see “6-4-5. Alarm setpoint setting” on page 52. (For items with “-” shown, the setpoint cannot be changed.)

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<Gas alarm buzzer sounding and lamp flashing patterns>

When a gas alarm occurs, the user is notified by the buzzer sounding, alarm LED array flashing, and vibration, in two stages. The individual operations are as follows:

Alarm type

First alarm

Second alarm

Third alarm

TWA alarm

STEL alarm

OVER alarm

M OVER alarm

Buzzer sounding

Repeated alternate strong and weak beeps at about 1-second intervals: “Beep, beep”

Repeated alternate strong and weak beeps at about 0.5-second intervals: “Beep, beep, beep, beep”





Repeated intermittent beeps at about 1-second intervals: “Beep, beep”

Alarm LED array

flashing

Repeated flashing at about 1-second intervals

Repeated flashing at about 0.5-second intervals






Vibration Vibration when alarm occurs None

For gases other than oxygen: “Alarm Pattern (H-HH-HHH)” For oxygen: “Alarm Pattern (L-LL-H)”

<Gas alarm display> If a gas alarm occurs, the alarm type is indicated at the bottom of the screen, and the corresponding gas concentration display blinks. If the detection range is exceeded (over scale), “OVER” blinks at the bottom of the screen and “∩∩∩” blinks in the gas concentration display area.

Display example Methane (CH4) concentration: 10 %LEL First alarm triggered

Alarm type

First alarm

Second alarm

Third alarm

TWA alarm

STEL alarm

OVER alarm

M OVER alarm

LCD display

“WARNING” appears at the bottom of the screen, and the gas concentration value blinks.

“ALARM” appears at the bottom of the screen, and the gas concentration value blinks.

“ALARM H” appears at the bottom of the screen, and the gas concentration value blinks.

“TWA” appears at the bottom of the screen, and the gas concentration value blinks.

“STEL” appears at the bottom of the screen, and the gas concentration value blinks.

“OVER” appears at the bottom of the screen, and “∩∩∩” blinks in the gas concentration value display area.

“M OVER” appears at the bottom of the screen, and “��” blinks in the gas concentration value display area.

Alarm lamp Buzzer

: 0.5-second interval

: 1-second interval

Second alarm setpoint

0 Time

Reset

Second alarm setpoint First alarm setpoint

0 Time

Reset

Alarm lamp Buzzer

: 0.5-second interval

: 1-second interval

First alarm setpoint

Third alarm setpoint

Third alarm setpoint

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NOTE Responses to an alarm can be checked using the alarm test in display mode. Note, however, that

the gas concentration value will not blink in alarm tests.

4-2. Fault alarm activation A fault alarm is triggered if an abnormality is detected in the product. (Self-latching) Fault alarm types include system abnormality, clock abnormality, battery voltage abnormality, and sensor abnormality. If a fault alarm occurs, the user is notified by the buzzer sounding and alarm LED array flashing. ・ Buzzer sounding: Repeated intermittent beeps at about 1-second intervals “Beep-beep, beep-beep” ・ Alarm LED array flashing: Repeated flashing at about 1-second intervals The following shows typical fault alarm displays:

System abnormality

Clock abnormality

Battery voltage abnormality

Sensor abnormality

If a fault alarm occurs, determine the cause and take appropriate action. If the problem lies with the product and the fault occurs repeatedly, contact Riken Keiki immediately. NOTE For more information on malfunctions (error messages), see “9 Troubleshooting” on page 81.

WARNING A gas alarm indicates the presence of extreme danger. The user must take appropriate action after

taking appropriate steps to ensure safety.

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5

5 Usage Instructions

5-1. Before using the product The operating precautions apply to both first-time users and those who have previously used the product. Ignoring these precautions may damage the product and result in inaccurate gas detection.

5-2. Preparing startup Check the following before starting gas detection: ・ Confirm that the battery level is sufficient. ・ Confirm that the filter inside the product is neither contaminated nor clogged.

NOTE If the settings for the product have been altered from an external device, be sure to confirm that the

settings have been altered correctly.

5-2-1. Charging the lithium ion battery Before using the product for the first time or if battery levels of the lithium ion battery are low, charge using the provided charger, as described below.

DANGER Charge the battery using the provided charger in a safe place. Charge the battery at ambient temperatures between 0 °C and 40 °C.

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<Charging the lithium ion battery>

1 Insert the DC plug of the charger into the battery charging contact of the main unit. Insert the DC plug cable from the top of the main unit aligning with the groove.

2 Plug the charger into the outlet. When the charger is connected, the charging indicator lamp lights up in green. When charging starts, the lamp lights up in orange. (Full charge requires about three hours at maximum.) Once charging is completed, the charging indicator lamp lights up in green.

3 Unplug the charger from the outlet when charging is complete.

CAUTION Be sure to turn off the power for the product before charging the battery. Do not use the product while charging the battery. The measurements obtained will not be correct.

Additionally, doing so will degrade the battery more quickly and reduce battery life. The charger is neither waterproof nor dustproof. Do not charge the battery while the product is wet. The charger is not explosion-proof. The main unit may get hot during charging. This does not indicate an abnormality. The main unit will grow warmer while charging. Once charging is completed, wait at least 10

minutes before use. Using the product while it is still hot may result in incorrect measurements. When fully charged, the battery cannot be charged. Always unplug the charger from the outlet when not in use.

DC plug

Charging indicator lamp

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5-3. Startup When the power is turned on, various settings including date and time and alarm setpoints are displayed, and then the measuring mode screen is displayed.

Turning on the power

Hold down the POWER button (for at least 3 seconds) until the buzzer blips. The power turns on.

The entire LCD display lights up.

NOTE When the power is turned on, the LCD, lamps and buzzer start to operate and the product vibrates.

Before using the product, check that these operations function correctly.

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Screen transition from powering on to displaying measurement screen When the power is turned on, the LCD display changes automatically as shown below before the measurement screen is displayed. <Display examples: Default settings> ( about 40 seconds )

Calibration notification display screen

* Displayed on Japan Ex specification only

Calibration expiration date display screen

* Displayed on general ATEX/IECEx specification only

Date and time display

Battery level/alarm pattern

display

Detection target gas display

Full scale display

First alarm setpoint display

Second alarm setpoint

display

Third alarm setpoint display

STEL alarm setpoint

display

TWA alarm setpoint display

Measurement screen

The buzzer blips twice and

then the measurement screen is displayed.

CAUTION Only for ATEX/IECEx specification

When the calibration date has expired, indicates that the calibration has expired when the power is turned on. The operation after calibration expiration depends on its setting. For information on the calibration procedure, see “7-2. Calibration” on page 63.

CONFIRM: Allows the user to confirm and select whether to proceed to measurement mode or to Auto calibration cylinder setting.

CANT USE: Measurement mode is not available. Proceed to Auto calibration cylinder setting by pressing the button or after 6 seconds.

NO EFFECT: Indicates that calibration has expired and allows the user to select whether to proceed to Auto calibration cylinder setting by pressing the button or to measurement mode after 6 seconds when there is no action.

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CAUTION When the bump test date has expired, indicates that the bump test date has expired when the

power is turned on. The operation after bump test expiration depends on its setting. For information on the bump test procedure, see “7-3. Bump test” on page 72.

CONFIRM: Allows the user to confirm and select whether to proceed to measurement mode or to Bump test cylinder setting.

CANT USE: Measurement mode is not available. Proceed to Bump test cylinder setting by pressing the button or after 6 seconds.

NO EFFECT: Indicates that calibration has expired and allows the user to select whether to proceed to Bump test cylinder setting by pressing the button or to measurement mode after 6 seconds when there is no action.

With models that detect combustible gases, the screen shown on the right may be displayed with the buzzer sounding and lamp flashing after the battery level and alarm pattern are displayed. If this screen is displayed, some combustible gases cannot be converted using the combustible gas conversion function. For information on the types of gases that cannot be converted, see “6-2-2. Combustible conversion gas selection” on page 35. If the screen shown on the right appears, the alarm can be temporarily reset by pressing the MODE button, but the combustible gas sensor should be replaced with a new one promptly.

If any abnormality is detected in the sensor, “FAIL” appears in place of the measured value just before the measurement screen is displayed, and a sensor abnormality alarm is triggered. If this occurs, press the MODE button to temporarily reset the sensor abnormality alarm. However, the alarm cannot be reset if there is an abnormality in all of the sensors. After the alarm is reset, “- - - -” appears in the concentration display area of the gas for which the sensor abnormality occurred, and detection will not be possible for that gas type. Contact Riken Keiki immediately.

After startup, perform “5-4. Air calibration” on page 27.

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NOTE If there is an abnormality in the built-in clock, a “FAIL CLOCK” fault alarm may be triggered. If this

occurs, press the MODE button. The fault alarm will be temporarily reset, and measurement will be started with the clock time remaining incorrect.

Lunch break When the lunch break setting is enabled, the screen is displayed with a five-second countdown to allow the user to confirm whether to retain the TWA and PEAK values from the last time the power was turned off and continue measurement or to reset the values when the power is turned on. Pressing the MODE button retains the measurement data, and pressing the AIR button resets the measurement data. If no button is pressed for five seconds, the measurement data is automatically retained.

Bump test expiration date When the bump test expiration date setting is enabled, the number of days remaining after the last bump test date until a specified setting date is displayed when the power is turned on. For information on the bump test expiration date setting, see “6-4-4. Bump test setting” on page 47.

Calibration notification display The calibration notification display (Japan Ex specification only) displays the date one year (365 days) after the last calibration date, together with the number of days remaining. The buzzer sounds if more than one year has elapsed since the last calibration date. To cancel the buzzer, press the AIR button. With ATEX/IECEx specifications only, the calibration expiration date appears when the power is turned on. The calibration expiration date display indicates the number of days remaining after the last calibration date until a specified setting date. For details, see “6-4-3. Calibration expiration date setting” on page 44.

Date and time Displays the date and time. The date and time can be set by following the instructions described in “6-4. User mode settings” on page 44. If an IrDA communication partner device is brought close to the product, it switches to communication mode. Pressing the AIR and MODE buttons together also switches to communication mode, even when no communication partner device is nearby.

Battery level/alarm pattern Displays the battery level (voltage) and alarm pattern setting (AL-L <self-latching>) on the screen. If an IrDA communication partner device is brought close to the product, it switches to communication mode. Pressing the AIR and MODE buttons together also switches to communication mode, even when no communication partner device is nearby.

Detection target gas Displays the detection target gas. The gas currently being converted is displayed at the bottom of the screen if a combustible gas is being converted.

Full scale Displays the full-scale value of the detection target gas. IEC or ISO is displayed in the full-scale display area if IEC or ISO LEL values are set.

Second alarm setpoint Displays the second alarm setpoint for the detection target gas.

Third alarm setpoint Displays the third alarm setpoint for the detection target gas.

STEL alarm setpoint (TWA and STEL are displayed only on models that detect gases other than combustible gases and oxygen.) Displays the STEL alarm setpoint for the detection target gas. The STEL value refers to the concentration of a toxic substance that does not adversely affect the user’s health with 15-minute continuous exposure, provided that daily exposures do not exceed the TWA value. Not displayed on models where CO and H2S are not included in the detection target gases.

TWA alarm setpoint (TWA and STEL are displayed only on models that detect gases other than combustible gases and oxygen.) Displays the TWA alarm setpoint for the detection target gas. The TWA value refers to the time-weighted average concentration limit of a toxic substance for a normal 8-hour workday and a 40-hour workweek to which almost all users may be repeatedly exposed without adverse health effect.

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5-4. Air calibration Air calibration refers to zero adjustment required to ensure accurate measurement of gas concentrations.

Air calibration procedure

1 Hold down the AIR button on the measurement mode screen.

The air calibration screen appears. Keep the AIR button pressed for as long as the screen shown on the right is displayed. Air calibration will not be performed if you release the button before the screen is displayed or while it is displayed.

2 Release the AIR button once the screen shown on the right appears.

If air calibration has been successfully completed, the display automatically returns to the measurement mode screen.

NOTE If air calibration fails, “FAIL” appears in the concentration display area for the faulty sensor. Press

the MODE button to reset the fault alarm (calibration failure). Resetting the alarm displays the value before calibration.

WARNING When air calibration is performed in the atmosphere, check the atmosphere for freshness before

starting. The presence of interference gases will make it impossible to perform air calibration correctly and potentially result in hazardous conditions in the event of actual gas leaks.

CAUTION After start-up, perform air calibration before using the product for gas detection. Always perform air calibration under conditions of pressure, temperature, and humidity similar to

those in the operating environment and in fresh air. Wait for the readout to stabilize before performing air calibration. If there is a temperature difference of 15 °C or more between the storage and usage locations, turn

on the power and allow the product to stand and acclimatize for about 10 minutes in an

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5-5. Gas detection

5-5-1. Basic operating procedures Turn on the power to proceed to the measurement mode screen.

DANGER If measuring inside manholes or enclosed spaces, never lean over or look into the manhole or

enclosed space. There is a danger that oxygen-deficient air or other gases may be discharged from such locations.


starting. If interference gases are present, it will not be possible to calibrate the product correctly, resulting in danger if actual gas leaks occur.

A gas alarm indicates the presence of extreme danger. The user must take appropriate action based on the situation.

If the battery voltage drops, gas cannot be detected. If a low battery voltage alarm occurs during use, turn off the power and promptly charge the battery in a safe place.

Do not block the buzzer sound opening. Doing so will make the alarm hard to hear.

CAUTION Check the settings before starting gas detection.

<Air calibration> <Measurement mode> <Display mode>

<Gas alarm state> <Fault alarm state>

Hold down

Measured value

Blinking

(Self-latching <reset after recovery to normal state>)

(Self-latching <reset after turning off the power>)

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5-5-2. Measurement mode In measurement mode, read the values on the LCD display.

Display example

NOTE The gas currently being converted is displayed at the bottom of the screen if a combustible gas is

being converted. The operating time will be reduced due to battery performance in cold environments. The response of the LCD display may slow at low temperatures. If the product is exposed to a combustible gas at concentrations of 100 %LEL or above, some

adsorbed gas may remain in the filter. After drawing in high-concentration combustible gas, always allow the product to stand in fresh air. Perform air cleaning until the reading returns to around zero to remove any adsorbed gases. Performing air calibration before a complete cleaning will result in inaccurate adjustments, with potential adverse effects on measurement. Locking over will occur if 100 %LEL is detected. This will not be reset until either the oxygen concentration decreases or you press the MODE button.

The zero point for carbon monoxide (CO) and hydrogen sulfide (H2S) sensors may fluctuate at low or high temperatures. If this occurs, perform air calibration in the ambient atmosphere.

CAUTION Note that if combustible gas sensors are used in an environment where silicone compounds,

halides, high concentrations of sulfides, or high concentrations of solvent gases are present, sensor life may be reduced, sensitivity to combustible gases may deteriorate, and accurate readings may not be obtained. If use in such environments is unavoidable, use for the shortest possible time and allow the product to stand in fresh air after use. Confirm that the reading returns to normal and is stabilized.

An oxygen concentration higher than a certain level is required in order for the combustible gas sensor <%LEL> in the product to correctly detect gases and display concentrations.

Do not expose the product to sudden pressure fluctuations. Oxygen readings will vary temporarily, preventing accurate measurement.

Do not use any gas other than nitrogen as the balance gas when calibrating or adjusting an oxygen sensor. Otherwise, oxygen reading errors will increase, preventing accurate measurement.

If the product is exposed to highly adsorptive gas, allow it to stand in fresh air. Confirm that the reading returns to zero before use.

The hydrogen sulfide (H2S) sensor may exhibit temporary fluctuations if exposed to sudden temperature variations. Allow the product to stand and acclimatize in the ambient atmosphere.

Oxygen

Hydrogen sulfide

Combustible gas(%LEL)

Carbon monoxide

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The carbon monoxide sensor (ESR-A1CP) includes a correction function to reduce interference due to hydrogen. This function works for hydrogen concentrations up to 2,000 ppm. If hydrogen is detected at a concentration of 2,000 ppm or higher, “H2” and “rich” are displayed alternately in the concentration display area. While measurement can continue, large errors will arise with carbon monoxide concentration readings due to the significant effects of hydrogen interference.

Concentration display: rich Concentration display: H2

Sensitivity may be reduced temporarily if the carbon monoxide sensor comes into contact with gas at concentrations exceeding its measurement range. If the sensor has come into contact with high-concentration gas, be sure to allow it to stand in fresh air and perform air cleaning.

Sensitivity may be reduced temporarily if the hydrogen sulfide (H2S) sensor comes into contact with gas at concentrations exceeding its measurement range. If the sensor has come into contact with high-concentration gas, be sure to allow it to stand in fresh air and perform air cleaning.

If you are measuring for 20 minutes or more outside the operating temperature range, temperature range error will be triggered. If temperature range error is triggered, leave it for 5 minutes or more within the operating temperature range or turn off the power of the main unit.

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5-6. Turning off the power

Hold down the POWER button. To turn off the power, wait for the display to return to zero (or 20.9 % for oxygen) in a safe place, then hold down the POWER button. The buzzer blips three times and “TURN OFF” appears on the display before the power turns off.

Power-off display

NOTE When turning off the power, hold down the button until the display turns off.

CAUTION If the concentration display does not return to zero (or 20.9 % for the oxygen concentration

display) after measurement is completed, allow the product to stand in fresh air until the display returns to zero before turning off the power.

CAUTION If the product has become dirty, wipe it with a rag or cloth soaked in water and firmly wrung out. When wiping the product clean, do not use organic solvents like alcohol or benzine or

commercially available cleaners.

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6

6 Setting Procedure

6-1. Display mode Display mode lets users review and change various display settings and perform other operations. Changed settings are saved.

6-1-1. Displaying display mode

Press the MODE button on the measurement mode screen. Pressing the MODE button displays the various screens in sequence. To change a setting, press the AIR button. The setting screen is displayed. Press the MODE button once settings are complete. The settings are saved and the display returns to the previous screen. To return to the measurement mode screen, press the MODE button several times in display mode.

NOTE If no action is taken for about 20 seconds, the display will return to the measurement screen. To test the alarm, press the AIR button and MODE button at the same time while an alarm setpoint

is displayed. Hold down the AIR button and MODE button at the same time in display mode to return to

measurement mode. To cancel before finalizing changes to the settings, hold down the AIR button and MODE button at

the same time. The display returns to display mode.

6-1-2. Display mode display details Screen notation

(Setting item) Display contents LCD display Reference page

PEAK (PEAK display/PEAK reset)

Displays the maximum gas concentration (or minimum oxygen concentration) detected since the power was turned on.

Hold down the AIR button to jump to the PEAK value clearing screen on page 34.

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Screen notation (Setting item)

Display contents LCD display Reference page

STEL (STEL display) * Displays only CO and H2S.

Displays the STEL value since the power was turned on. The STEL value refers to the sum of 15 pieces of average value data for measured values over a period of 60 seconds divided by 15. The value is refreshed every 60 seconds.

-----

TWA (TWA display) * Displays only CO and H2S.

Displays the TWA value since the power was turned on. The TWA value refers to the integrated average value of measured values over a period of 60 seconds divided by 480. The value is refreshed every 60 seconds.

-----

HC GAS (Combustible converting gas selection) * Displayed only on models that detect combustible gases

Selects the conversion gas from the list of gases preregistered in the product.

Press the AIR button to jump to the setting screen on page 35.

LONG.BATT (Long-life battery setting) * Displayed only on models that detect combustible gases

Enables/disables the long-life battery setting.

Press the AIR button to jump to the setting screen on page 37.

CAL DATA (Calibration data display) * Displayed on general ATEX/IECEx specification only

Displays the calibrated gas type and the calibration date.

Press the AIR button to jump to the display screen on page 38.

BUMP DATA (Bump data display)

Displays the bump test gas type and the test date.

Press the AIR button to jump to the display screen on page 39.

DATE Date, time, and temperature display

Displays the date, time, and temperature.

-----

ALARM-PT (Alarm setpoint display)

Displays various alarm setpoints.

Press the AIR button to jump to the confirmation screen on page 40.

NOTE The previously measured PEAK and TWA values retained the last time the power was turned off are

displayed when the lunch break function is enabled. HC GAS (combustible conversion gas selection) is not displayed for calibration gas types other than

CH4 or i-C4H10. Bump data is displayed if the bump test expiration date display is enabled in user mode. Calibration data is displayed if the calibration expiration date display is enabled in user mode. The temperature displayed in the date and time and temperature display is the internal temperature

of the product. This value differs from the actual ambient temperature.

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6-2. Display mode settings Switch to display mode from the measurement screen, and check and change settings in display mode.

6-2-1. Clearing PEAK value display This clears the PEAK value (the maximum gas concentration or minimum oxygen concentration measured since the power was turned on).

1 Press the MODE button on the measurement screen to display the PEAK screen.

2 Hold down the AIR button.

3 Release the AIR button once “RELEASE” is displayed on the screen.

The PEAK value is cleared and “END” appears before the display returns to the screen in Step 1.

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6-2-2. Combustible conversion gas selection Combustible gas measurements can be displayed as a concentration converted to a gas registered in the product. The following combustible gases can be converted: <Combustible conversion gas list>

Conversion gas Gas name displayed

Gas conversion Conversion when

conversion is restricted

JG specification CH4 i-C4H10

Methane CH4 - × × Isobutane i-C4H10 - Hydrogen H2 Methanol CH3OH × × Acetylene C2H2 Ethylene C2H4 Ethane C2H6 × Ethanol C2H5OH × × Propylene C3H6 Acetone C3H6O × × Propane C3H8 × Butadiene C4H6 Cyclopentane C5H10 Benzene C6H6 × × N-hexane n-C6H14 × Toluene C7H8 × × N-heptane n-C7H16 × Xylene C8H10 × × N-nonane n-C9H20 × × Ethyl acetate EtAc × × Isopropyl alcohol IPA × Methyl ethyl ketone MEK × × Methyl methacrylate MMA × × Dimethyl ether DME × Methyl isobutyl ketone MIBK × × Tetrahydrofuran THF × ×

CAUTION On models that detect combustible gases, the screen shown on the right

may be displayed with the buzzer sounding and lamp flashing after the power is turned on or calibration is performed. If this screen is displayed, the conversion function cannot be used for gas types indicated by an “×” in the “Conversion when conversion is restricted” column. If the screen shown on the right appears, the alarm can be temporarily reset by pressing the MODE button, but the combustible gas sensor should be replaced with a new one promptly.

When using the conversion function as JG (Japanese Government) type approval specification, select gas types indicated by an “” in the “JG specification” column. If gas types indicated by an “×” in the “JG specification” column are selected, this product does not meet the requirements of JG type approval.

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NOTE Combustible conversion gas selection is displayed for CH4 and i-C4H10. This does not appear if “Display mode item display: ON/OFF” is disabled in user mode. To cancel before finalizing changes to the settings, hold down the AIR button and MODE button at

the same time. The display returns to display mode. The alarm accuracy and alarm delay time shown in the specifications list apply only to the

calibration gas. The concentration display when converted should be treated as approximate. To display accurate

concentrations, you must perform calibration using the target gas. To perform span adjustment using the target gas, please contact Riken Keiki.

For information on the list of gases that can be converted, see the “Combustible conversion gas list” on page 35.

This product is supplied with several models depending on the combustible gas detected. Depending on the particular models, certain gas types may not be converted. See the “Combustible conversion gas list”.

Even if a combustible conversion gas is selected, indications will be provided if other combustible gases are present in the usage environment.

However, if hydrogen (H2) is selected as a conversion gas, no indications will be issued, even if present in the usage environment for “Conversion when conversion is restricted” in the “Combustible conversion gas list”.

If conversion is used, the indication accuracy for the product will not be achieved.

1 Press the MODE button on the measurement screen several times to display the LIST screen.

2 Press the AIR button several times to display the combustible gas you want to change. Pressing the AIR button toggles through the list of combustible gases. The default setting is the calibration gas for the combustible gas sensor.

3 Press the MODE button when the combustible gas to be changed is displayed on the screen.

“END” appears and the display returns to the screen in Step 1.

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6-2-3. Long-life battery setting This enables/disables the long-life battery setting. The default setting is “OFF”. When set to “ON”, the combustible gas concentration is refreshed every 15 seconds instead of every 5 seconds. NOTE The setting is retained even when the power is turned off. This does not appear if “Display mode item display: ON/OFF” is disabled. If the long-life battery setting is enabled, no minus sensor alarm will be issued for the combustible

gas sensor. The “L” lights up at the top of the screen when the long-life battery setting is enabled.

1 Press the MODE button on the measurement screen several times to display the LONG.BATT screen.

2 Press the AIR button to select “ON” or “OFF”. The default setting is “OFF”.

3 Press the MODE button.


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6-2-4. Calibration data display This displays the calibration date. NOTE Calibration data is not displayed if the calibration expiration date setting is disabled in user mode.

Calibration data is displayed only on general ATEX/IECEx specification.

1 Press the MODE button on the measurement screen several times to display the CAL DATA screen.

2 Press the AIR button to select “YES” or “NO”. Pressing the AIR button cycles the display through “CH4” → “O2” → “H2S” → “CO” in sequence.



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6-2-5. Bump data display This displays the bump test date. NOTE Bump data is not displayed if the bump test expiration date setting is disabled in user mode. After the gas calibration, the date is updated automatically.

1 Press the MODE button on the measurement screen several times to display the BUMP DATA screen.

2 Press the AIR button to select “YES” or “NO”. Pressing the AIR button cycles the display through “CH4” → “O2” → “H2S” → “CO” → “CO2” → ...


The display returns to the screen in Step 1.

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6-2-5. Alarm setpoint display This allows alarm setpoints to be displayed and testing of LED, buzzer, and vibrator operations. NOTE TWA and STEL are displayed only on models that detect gases other than combustible gases and

oxygen.

1 Press the MODE button on the measurement screen several times to display the ALARM-PT screen.

2 Press the AIR button. Pressing the AIR button cycles the display through “F.S.” (FULL SCALE) → “WARNING” → “ALARM” → “ALARM H” → “STEL” → “TWA” → “F.S.” (FULL SCALE) → ...

The corresponding alarm can be tested by pressing the AIR button and MODE button at the same

time. Press any button to reset the alarm.


The display returns to the screen in Step 1.

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6-3. User mode User mode lets you set the date and time, alarm setpoints, and other settings.

6-3-1. Displaying user mode

1 With the power turned off, press the AIR button and POWER button at the same time.

2 Release the buttons when the buzzer blips. The power turns on, and the user mode menu appears.

3 Use the AIR button to select an item to be set, then using the MODE button, go to the setting screen.

4 Once settings are complete, press the AIR button on the user mode menu several times to select “START”, then press the MODE button. The product operates in the same way as when the power has just been turned on and proceeds to the measurement screen.

NOTE The display returns to the user mode menu after each setting. To return to the menu while

configuring the settings, hold down the AIR button and MODE button at the same time. A password input screen is displayed if the password setting is enabled in user mode. For

information on how to change the default password, see “6-4-12. User password setting” on page 59.

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6-3-2. User mode settings

Screen display (setting item) LCD display Reference

page

BUMP (Bump test)

P. 44

GAS CAL (Calibration)

P. 44

CAL SET (Calibration expiration date setting) * Displayed on general ATEX/IECEx specification only

P. 44

BUMP SET (Bump test setting)

P. 47

ALARM-PT (Alarm setpoint setting)

P. 52

LUNCH (Lunch break: ON/OFF)

P. 54

BEEP (Confirmation beep setting)

P. 55

BL TIME (LCD lighting time setting)

P. 57

KEY TONE (Key tone: ON/OFF)

P. 57

DISP SET (Display mode item display: ON/OFF)

P. 58

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Screen display (setting item) LCD display Reference

page

DATE (Date and time setting)

P. 58

PASSWORD (Password setting)

P. 59

ROM/SUM (ROM/SUM display)

P. 60

START (Measurement start)

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6-4. User mode settings User mode allows settings to be changed to increase usability.

6-4-1. Bump test The product includes a function for performing a bump test (function check). Here, you can select "Perform Bump Test (BUMP TEST)" and "Switch to measurement start screen from bump test (BUMP TEST)". After the bump test is successful, the screen will automatically move to the measurement start screen. *If multiple clinder settings are selected, the measurement start screen will not move automatically after the success of bump test. For information on the bump test procedure, see “7-3. Bump test” on page 72.

6-4-2. Calibration The product’s GAS CAL mode allows automatic calibration (AUTO CAL) using preset gas concentrations in addition to air calibration. Span adjustment requires dedicated tools and a calibration gas. Contact Riken Keiki. After successful gas calibration, the screen will automatically move to the measurement start screen. *If multibple cylinder settings are selected, the measurement start screen will not move automatically after the success of bump test. . For information on the calibration procedure, see “7-2. Calibration” on page 63.

6-4-3. Calibration expiration date setting

This section describes “Calibration expiration date: ON/OFF”, “Calibration expiration date interval”, and “Operation after calibration date expired”. * Displayed on general ATEX/IECEx specification only NOTE Once setting is complete, press the AIR button to select “ESCAPE”, then press the MODE button.

The display returns to the user mode menu.

<Calibration expiration date setting menu>

1 Press the AIR button on the user mode menu to select “CAL SET”, then press the MODE button. The calibration expiration date setting menu screen is displayed.

2 Press the AIR button to select the required setting, then press the MODE button.

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Setting item LCD display Reference page

CAL RMDR

<Calibration expiration date: ON/OFF> P. 45

CAL INT

<Calibration expiration date interval> P. 46

CAL EXPD

<Operation after calibration date expired> P. 46

ESCAPE

<Calibration expiration date: ON/OFF> This lets you enable and disable the calibration expiration date.

1 Press the AIR button to select “CAL RMDR”, then press the MODE button. The calibration expiration date ON/OFF selection is displayed.

2 Press the AIR button to select ON or OFF for the calibration expiration date setting, then press the MODE button. Pressing the AIR button toggles between ON and OFF for the calibration expiration date. The default setting is “ON”. * General ATEX/IECEx specification only

3 Press the MODE button. “END” is displayed and the display returns to the calibration expiration date setting menu.

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<Calibration expiration date interval> This lets you select the number of days until the calibration expires.

1 Press the AIR button to select “CAL INT”, then press the MODE button.

2 Press the AIR button to select the number of days for calibration expiration. Pressing the AIR button lets you select the calibration expiration date interval between 1 and 1,000 days. The default setting is “90” days.

3 Press the MODE button. “END” appears and the display returns to the calibration expiration date setting menu.

<Operation after calibration date expired> This lets you specify the operation after the calibration date has expired.

1 Press the AIR button to select “CAL EXPD”, then press the MODE button.

2 Press the AIR button to select the operation after the calibration date has expired. Pressing the AIR button displays the following operations after calibration date expiration. ・ CONFIRM: Action depends on the operation. Press the AIR button to proceed

to measurement mode. Press the MODE button to proceed to Auto calibration cylinder setting.

・ CANT USE: Measurement mode is not available. Press the MODE button or after 6 seconds without any operation to proceed to Auto calibration cylinder setting.

・ NO EFFECT: Action depends on the operation. After the indication that calibration has expired, press the MODE button to proced to Auto calibration cylinder setting. After 6 seconds without any operation, proceed to measurement mode automatically. The default setting is “CONFIRM”.

3 Press the MODE button. “END” appears and the display returns to the calibration expiration date setting menu.

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6-4-4. Bump test setting

This lets you set the various conditions for bump testing.

<Bump test setting menu>

1 Press the AIR button on the user mode menu to select “BUMP SET”, then press the MODE button. The bump test menu screen is displayed.



SETTINGS

<Bump time selection> P. 48 <Bump tolerance selection> P. 49 <Calibration time selection after bump test> P. 49 <Calibration after bump test: ON/OFF> P. 50

BUMP.RMDR

<Bump test expiration date display: ON/OFF> P. 50

BUMP INT

<Bump expiration date interval selection> P. 51

BUMP.EXPD

<Operation setting after bump test expiration> P. 51

ESCAPE

NOTE Once setting is complete, press the AIR button to select “ESCAPE”, then press the MODE button.


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<Bump time selection> This sets the time for introducing the test gas.

1 Press the AIR button to select “SETTINGS”, then press the MODE button. The bump test setting menu is displayed.

2 Press the AIR button to select “GAS TIME”, then press the MODE button. The bump time is displayed.

3 Press the AIR button to select the bump time, then press the MODE button. Pressing the AIR button lets you select the bump time from a choice of 30, 45, 60, and 90 seconds. The default setting is “30 SEC”.

4 Press the MODE button. “END” appears and the display returns to the bump test setting menu.

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<Bump tolerance selection> This sets the threshold for checking the test gas. Gases other than oxygen: Calibration concentration ± (calibration concentration × tolerance) Oxygen: Calibration concentration ± (difference between calibration concentration and 20.9% × tolerance)


2 Press the AIR button to select “CHECK”, then press the MODE button. The bump tolerance is displayed.

3 Press the AIR button to select the bump tolerance, then press the MODE button. Pressing the AIR button lets you select the bump tolerance from a choice of 10, 20, 30, 40, and 50 %. The default setting is “50” %.


<Calibration time selection after bump test This selects the time for calibration after a bump test has failed.


2 Press the AIR button to select “CAL TIME”, then press the MODE button. The time for calibration after a bump test is displayed.

3 Press the AIR button to select the calibration time after a bump test, then press the MODE button. Pressing the AIR button lets you select the calibration time after a bump test from a choice of 90 and 120 seconds. The default setting is “90 SEC”.


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<Calibration after bump test: ON/OFF> This enables/disables the function for automatic calibration if a bump test fails.


2 Press the AIR button to select “AUTO CAL”, then press the MODE button. The ON/OFF selection is displayed for calibration after a bump test fails.

3 Press the AIR button to select ON or OFF for calibration after a bump test fails, then press the MODE button. Pressing the AIR button lets you select ON or OFF for calibration after a bump test fails. The default setting is “ON”.


<Bump test expiration date display: ON/OFF> This selects the notification for bump test expiration.

1 Press the AIR button to select “BUMP.RMDR”, then press the MODE button. The ON/OFF selection is displayed for bump test expiration date notification.

2 Press the AIR button to select ON or OFF for the bump test expiration date display. Pressing the AIR button lets you select ON or OFF for the bump test expiration date display. The default setting is “OFF”.


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<Bump expiration date interval selection> This sets the interval until the bump test expiration date notification is given after a bump test.

1 Press the AIR button to select “BUMP INT”, then press the MODE button. You can select the number of days until the bump test expiration date.

2 Press the AIR button to select the bump test expiration date interval. Pressing the AIR button lets you select the bump test expiration date interval from 0 to 30 days. The default setting is “30” days.


<Operation setting after bump test expiration> This selects the operation after the bump test expiration date display.

1 Press the AIR button to select “BUMP.EXPD”, then press the MODE button. You can select the operation after bump test expiration.

2 Press the AIR button to select the operation after bump test expiration operation confirmation. Pressing the AIR button displays the following operations after bump test expiration: Pressing the AIR button displays the following operations after calibration date expiration. ・ CONFIRM: Action depends on the operation. Press the AIR button to proceed to

measurement mode. Press the MODE button to proceed to Bump test cylinder setting.

・ CANT USE: Measurement mode is not available. Press the MODE button or after 6 seconds without any operation to proceed to Bump test cylinder setting.

・ NO EFFECT: Action depends on the operation. After the indication that calibration has expired, press the MODE button to proced to Bump test cylinder setting. After 6 seconds without any operation, proceed to measurement mode automatically.

The default setting is “CONFIRM”.


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6-4-5. Alarm setpoint setting This section describes the settings for the first to third alarm setpoints, STEL alarm setpoint, and TWA alarm setpoint and how to restore the default settings.

<Alarm setpoint setting> Alarm setpoints can be set using one-digit units.

Detection target gas 1 digit Lower limit Upper limit Combustible gas (HC/CH4) 1 %LEL 5 %LEL 60 %LEL Carbon monoxide (CO) 1 ppm 20 ppm 2,000 ppm Hydrogen sulfide (H2S） 0.1 ppm 1.0 ppm 200.0 ppm

Detection target gas 1 digit First/second alarm Third alarm

Lower limit Upper limit Lower limit Upper limit Oxygen (O2) 0.1 vol% 0.0 % 20.0 % 21.8 % 40.0 %

NOTE Set the alarm setpoints as follows: First alarm ≤ second alarm ≤ third alarm (first alarm ≥ second

alarm for oxygen)

1 Press the AIR button on the user mode menu to select “ALARM-PT”, then press the MODE button.

2 Press the AIR button to select the gas type, then press the MODE button. Pressing the AIR button alternately displays the detection target gas and the alarm setpoint reset screen (page 53). Pressing the MODE button displays the first alarm setpoint (WARNING) setting screen.

3 Press the AIR button to select a numerical value for the first alarm setpoint, then press the MODE button. The second alarm setpoint (ALARM) setting screen is displayed.

4 Press the AIR button to select the second alarm setpoint numerical value, then press the MODE button. The third alarm setpoint (ALARM H) setting screen is displayed.

5 Press the AIR button to select the third alarm setpoint numerical value, then press the MODE button. For toxic gas, the STEL and TWA setting screens are displayed after the above steps. Set these in the same way. “END” appears and the alarm setpoint reset screen appears.

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NOTE For information on how to reset settings, see “Resetting alarm setpoints” on page 53. The alarm

setpoint reset screen may not appear if the product is not set correctly. If this occurs, contact Riken Keiki.

For more information on alarm setpoints, see “4 Alarm Activation” on page 18.

<Resetting alarm setpoints> This restores alarm setpoints to their default settings.

1 Press the AIR button on the user mode menu to select “ALARM-PT”, then press the MODE button.

2 Press the AIR button several times. The alarm setpoint reset screen is displayed.

3 Press the MODE button. The alarm setpoint reset confirmation screen is displayed.

To cancel resetting, press the AIR button.


The alarm setpoint reset confirmation screen is displayed.

5 Press the MODE button. “END” appears and the display returns to the user mode menu.

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6-4-6. Lunch break: ON/OFF This lets you enable and disable the lunch break function. The lunch break function retains TWA and PEAK values from the last time the power was turned off and loads them to continue measurement the next time the power is turned on.

1 Press the AIR button on the user mode menu to select “LUNCH”, then press the MODE button. The lunch break setting screen is displayed.

2 Press the AIR button to select ON or OFF for the lunch break function. Pressing the AIR button lets you select ON or OFF for the lunch break function. The default setting is “OFF”.


NOTE When the lunch break setting is enabled, a confirmation screen is displayed asking the user

whether to retain the TWA and PEAK values from the last time the power was turned off and continue measurement or to reset the values when the power is turned on.

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6-4-7. Confirmation beep setting This function provides an audible indication of whether the product is operating normally. The buzzer sounds at preset intervals while measurement is underway. The following functions can also be operated with "BUMP / CAL", "ALM ALRT" and "B / C / ALM”. 1. BUMP/CAL ・Starts operation when calibration deadline setting is ON and or calibration is expired, or bump deadline

setting is ON and bump is expired. ・Once the operation is starts, it does not stop until all loaded gases are calibrated or bumped.

(Except H2 cancellation) ・Every interval setting time The LED lights up for about one second. 2. ALM ALRT ・Starts operation when a gas alarm is issued. (Including minus sensor failure) ・Once the operation is starts, it does not stop until all loaded gases are calibrated or bumped.

(Except H2 cancellation) ・Every interval setting time The LED lights up for about one second. 3. B/C/ALM ・Starts operation when calibration deadline setting is ON and or calibration is expired, or bump deadline

setting is ON and bump is expired. ・Once the operation is starts, it does not stop until all loaded gases are calibrated or bumped.

(Except H2 cancellation) ・Every interval setting time The LED lights up for about one second.

<Confirmation beep setting menu>

1 Press the AIR button on the user mode menu to select “BEEP”, then press the MODE button. The confirmation beep menu screen is displayed.



BEEP SEL

<Beep operation setting> P. 53

BEEP INT

<Beep interval setting> P. 53

ESCAPE

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<Beep operation setting>

This lets you set the confirmation beep operation.

1 Press the AIR button to select “BEEP SEL”, then press the MODE button. The beep operation selection screen is displayed. However, if you change the setting, the operations of "BUMP / CAL", "ALM ALRT" and "B / C / ALM" will stop.

2 Press the AIR button. Pressing the AIR button displays the following screens in sequence: ・ OFF ・ LED (LED lights only) ・ BUZZER (buzzer only) ・ LED+BUZZ (LED and buzzer) ・ BUMP/CAL ・ ALARM ALRT ・ B/C/ALM The default setting is “OFF”.

3 Press the MODE button. “END” appears and the display returns to the confirmation beep setting menu.

<Beep interval setting> This lets you set the interval between confirmation beeps.

1 Press the AIR button to select “BEEP INT”, then press the MODE button. The beep interval setting screen is displayed.

2 Press the AIR button. Pressing the AIR button lets you select the beep interval from a choice of 0.5 minutes and from 1 to 99 minutes. The default setting is “5” minutes.

3 Press the MODE button. “END” appears and the display returns to the confirmation beep setting menu.

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6-4-8. LCD lighting time setting This lets you set the duration for which the LCD display remains lit.

1 Press the AIR button on the user mode menu to select “BL TIME”, then press the MODE button. The backlight lighting time setting screen is displayed.

2 Press the AIR button to select the backlight lighting time. Pressing the AIR button lets you select a backlight lighting time of OFF or 1 to 255 seconds. The default setting is “30 SEC”.


6-4-9. Key tone: ON/OFF This enables/disables the key operation tone.

1 Press the AIR button on the user mode menu to select “KEY TONE”, then press the MODE button. The key tone setting screen is displayed.

2 Press the AIR button to select ON or OFF for the key tone. Pressing the AIR button lets you select ON or OFF for the key tone. The default setting is “ON”.


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6-4-10. Display mode item display: ON/OFF This lets you set whether display mode items that can be set are displayed or hidden. When set to OFF, items such as “HC GAS” (combustible conversion gas selection) are not displayed in display mode.

1 Press the AIR button on the user mode menu to select “DISP SET”, then press the MODE button. The display mode item display setting screen is displayed.

2 Press the AIR button to select ON or OFF for the display mode item display. Pressing the AIR button lets you select ON or OFF for the display mode item display. The default setting is “ON”.


6-4-11. Date and time setting This sets the date and time of the internal clock

1 Press the AIR button on the user mode menu to select “DATE”, then press the MODE button. The date and time setting screen is displayed. The item currently blinking can be set.

2 Press the AIR button to select the required setting item, then press the MODE button. Set the date and time in the sequence year -> month -> day -> hour -> minute.

Press the MODE button after setting the “minute” item. “END” appears and the display returns to the user mode menu.

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6-4-12. User password setting This lets you protect access to user mode using a password. The password can be set as a four-digit number in the range 0000 to 9999.

1 Press the AIR button on the user mode menu to select “PASSWORD”, then press the MODE button. The password can be enabled or disabled on the user mode password setting screen.

2 Press the AIR button to select “ON”, then press the MODE button. The password input screen is displayed. The default setting is “0000”. The password can be set as a four-digit number in the range 0000 to 9999.

3 Press the AIR button to select a number from 0 to 9, then press the MODE button. The number is input as the first digit of the password and the second digit blinks.

Press the MODE button after entering the final digit. “END” appears and the display returns to the user mode menu.

<Accessing user mode when password-protected>

1 With the power turned off, press the AIR button and POWER button at the same time. Release the buttons when the buzzer blips. The password input screen is displayed.

2 Enter the preset password. Press the AIR button to select the number for the currently selected digit, then press the MODE button to confirm.

The user mode menu is displayed once the

password has been correctly entered. If the password entered is incorrect, an error is displayed. The display switches to “Screen transition from powering on to displaying measurement screen” in “5-3. Startup”.

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6-4-13. ROM/SUM display This displays the program number and SUM value of the product. * This is not normally used by the user.

1 Press the AIR button on the user mode menu to select “ROM/SUM”, then press the MODE button. The ROM/SUM screen is displayed.

The following information is displayed alternately on the ROM/SUM screen. ・ MAIN ROM ・ SENS. ROM


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7

7 Maintenance The product is an important safety and disaster-prevention device. Maintain the product at regular intervals to ensure performance and improve disaster-prevention and safety reliability.

7-1. Maintenance intervals and maintenance items The following items should be maintained regularly before using the product: ・ Daily maintenance: Perform maintenance before commencing work. ・ Monthly maintenance: Perform maintenance by testing the alarms once a month. ・ Regular maintenance: Perform maintenance at least once a year (ideally, at least once every six

months).

Maintenance item

Maintenance details Daily

maintenance Monthly

maintenance Regular

maintenance

Battery level Check to confirm that battery levels are adequate.

Concentration display

Check to confirm that the concentration readout is 0 (or 20.9 % for oxygen meter) by measuring fresh air. If the readout is not 0, check to confirm that no interference gases are present, then perform air calibration.

Main unit operation

Check the LCD display to confirm that the readout is not faulty.

Filter Check to confirm that the filter is not dirty.

Alarm test Test the alarm and check to confirm that the alarm LED arrays, buzzer, and vibrator all operate correctly.

-

Span adjustment

Perform span adjustment using a calibration gas. - -

Gas alarm check

Check the gas alarm with a calibration gas. - -

NOTE Span adjustment requires dedicated tools and preparation of a calibration gas. Always contact

Riken Keiki for span adjustment. The built-in sensors have finite service lives and must be replaced regularly. If the sensors cannot be calibrated using span adjustment, the readings are not restored after air

calibration, or the readings fluctuate, the sensors are at the end of their life. Contact Riken Keiki for replacement.

WARNING If an abnormality is discovered in the product, contact Riken Keiki immediately.

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Maintenance service

Riken Keiki provides services related to regular maintenance including span adjustment, as well as other adjustments and maintenance. Preparing calibration gas requires the use of dedicated tools, such as gas cylinders of the specified concentration and gas sampling bags. Our certified service engineers have expert knowledge of the dedicated tools used for these services, along with expertise in products. Please take advantage of the Riken Keiki maintenance service to maintain safe operation of the product. The maintenance service includes the following main aspects. Please contact Riken Keiki for more information.

<Main maintenance service details> Battery level check

Checks battery levels.

Concentration display check

Checks to confirm that the concentration readout is 0 (or 20.9 % for oxygen meter) using a zero gas. Zero calibration (zero adjustment) is performed if the reading is not zero.

Filter check Checks the dust filter for contamination and clogging. The filter is replaced if dirty or clogged.

Alarm test Tests the alarm to check to confirm that the alarm LEDs, buzzer, and vibrator all operate correctly.

Span adjustment

Performs span adjustment using a calibration gas.

Gas alarm check

Checks the gas alarm using a calibration gas. Checking alarms (confirming alarm activation when alarm setpoint is

reached) Checking delay time (checking delay time until alarm activation) Checks the buzzer, LEDs, vibrator, and concentration display. (Checks

operation for each of the three-step alarms.)

Product cleaning and repair (visual inspection)

Checks the exterior of the product for dirt and damage; cleans and repairs any prominent problem areas. Parts are replaced if cracked or damaged.

Product operation check

Operates the buttons to check function operations and parameters.

Consumable part replacement

Replaces degraded components such as sensors and filters.

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7-2. Calibration The product can be calibrated using automatic calibration with preset gas concentrations in addition to air calibration. Span adjustment requires dedicated tools and a calibration gas. Contact Riken Keiki.

7-2-1. Preparation for calibration This section describes how to calibrate the product using calibration adapter (simple type).

<Required equipment/materials> Calibration gas Gas sampling bag Calibration adapter (simple type) *ATEX/IECEx specification is shipped with this parts. Pump

<Recommended calibration gas concentrations>

Detection target gas Sensor model Calibration gas Calibration gas concentration

Combustible gas (HC) NCR-6309 Isobutane (i-C4H10) 50%LEL (0.9 vol%)

Combustible gas (CH4) NCR-6309 Methane (CH4) 50%LEL (2.5 vol%)

Hydrogen sulfide (H2S） ESR-A1DP or ESR-

A13i Hydrogen sulfide (H2S） 25.0 ppm

Oxygen (O2) ESR-X13P Oxygen (O2)

Nitrogen diluted 12.0 %

Carbon monoxide (CO) ESR-A1DP,

ESR-A1CP, or ESR-A13P

Carbon monoxide (CO) 50 ppm

Carbon monoxide (CO) ESR-A1CP Hydrogen (H2)

air diluted 500 ppm

* Hydrogen must be calibrated in the range 10 °C to 30 °C. * The same applies to bump test gas.

CAUTION Do not use lighter gas to check the sensitivity of the product. Constituents in the lighter gas may

degrade sensor performance.

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<Gas supply method> Attach a calibration adapter (simple type) to the product, connect the gas sampling bag as shown in the figure below to introduce gas at a flow rate of 250 mL/min, and wait 60 seconds after the reading increases before calibrating.

NOTE RP-3R (option) or SDM-3R (option) can also be used for calibration in addition to the methods

described above. To use RP-3R (option), the pump mode should be set to Low mode.

ガス袋

Pump

250mL/min

GAS IN

GAS OUT

CAUTION When supplying gas, leave the GAS OUT side open and discharge the supplied gas to a safe

place, or connect the gas sampling bag to the GAS OUT side to recover the supplied gas. If it is used and stored for a long time in a dry environment, the hydrogen gas sensitivity calibration

may not be possible. If FAIL SENSOR is displayed at the time of hydrogen gas sensitivity calibration, release the main body overnight or more in an environment with sufficient humidity. Please install again and perform gas calibration again. However, if CO gas sensitivity calibration can not be performed, please contact your dealer or our nearest sales office for sensor replacement.

WARNING Calibration gas

The calibration gas is a hazardous gas (e.g., combustible gas, toxic gas, oxygen deficiency). Handle the gas and related jigs and tools with due care.

Gas sampling bag Use different gas sampling bags for each gas type and concentration to ensure accurate calibration.

Calibration location Do not calibrate in a confined space. Do not calibrate in locations where gases such as silicone and spray can gases are used. Calibrate indoors at normal temperatures with no significant fluctuations (within ±5 °C).

Carbon monoxide sensor (ESR-A1CP) calibration The carbon monoxide sensor with hydrogen interference correction function (ESR-A1CP) must

be calibrated separately for carbon monoxide and hydrogen. The carbon monoxide and hydrogen used for calibration must each be a single gas. Calibration

can be performed used a gas mixture, but correct span adjustment will not be achieved, and concentration readings will be inaccurate.

If hydrogen sensitivity is not calibrated, carbon monoxide readings may be slightly higher or lower than the actual concentrations when measured in environments where hydrogen is also

t

Gas sampling bag

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7-2-2. Calibration setting menu This section describes “Air calibration”, “Auto calibration concentration setting”, “Auto calibration cylinder setting”, “Auto calibration”, and “CO2 zero calibration”.

1 Press the AIR button on the user mode menu to select “GAS CAL”, then press the MODE button. The calibration menu screen is displayed.



AIR CAL

“7-2-3. Air calibration” (P. 66)

AUTO CAL

“7-2-4. Auto calibration” (P. 67) “7-2-6. Auto calibration cylinder setting” (P. 70) “

7-2-7. Auto calibration gas concentration selection” (P. 71)

ESCAPE



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7-2-3. Air calibration

1 Press the AIR button to select “AIR CAL”, then press the MODE button. The air calibration screen is displayed.

2 Hold down the AIR button.

3 Release the button when “RELEASE” is displayed. Air calibration is performed.

“PASS” is displayed if air calibration was successful.


starting. The presence of interference gases will make it impossible to perform zero adjustment correctly and potentially result in hazardous conditions in the event of actual gas leaks.

CAUTION Always perform air calibration under conditions of pressure, temperature, and humidity similar to

those in the operating environment and in fresh air. Wait for the readout to stabilize before performing air calibration.

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The current concentration after air calibration appears. The display returns to the calibration menu screen. “FAIL” is displayed if calibration was unsuccessful. “END” appears and the display returns to the calibration menu screen.

NOTE If air calibration fails, “FAIL” appears next to the measurement for the faulty sensor together with

“AIR CAL”. Press the MODE button to reset the fault alarm (calibration failure). Air calibration will not be performed for the faulty sensor and the concentration will be calculated using the value before calibration.

Air calibration can also be performed in measurement mode. (P. 27)

7-2-4. Auto calibration This calibrates for each gas at the specified concentration.

1 Press the AIR button to select “AUTO CAL”, then press the MODE button.

2 Select the cylinder for calibration, then press the MODE button. For information on cylinder settings, see “7-2-6. Auto calibration cylinder setting” on page 70.

3 Introduce the calibration gas, wait 60 seconds, and then press the MODE button.

Auto calibration is performed.

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“PASS” is displayed if auto calibration was successful. “FAIL” is displayed if calibration was unsuccessful.

The concentration after auto calibration is displayed.

On Japan Ex specification only, the concentration and sensor reserve value after auto calibration are displayed after auto calibration has been successfully performed.

Moves to the measurement start screen.

NOTE Air calibration must always be performed before auto calibration.

CAUTION Air calibration must always be performed before auto calibration. For models with a combustible gas sensor installed, the screen shown on

the right may be displayed after auto calibration. If this screen is displayed, some combustible gases cannot be converted using the combustible gas conversion function. For information on the types of gases that cannot be converted, see “6-2-2. Combustible conversion gas selection” on page 35. If the screen shown on the right appears, replace the combustible gas sensor with a new one promptly.

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7-2-5. Switch from AUTO calibration to measurement start screen

In this section, it explains about switchment from AUTO calibration to measurement start screen.

1 Press the AIR button and select “AUTO CAL” and press the MODE button. AUTO calibration screen is displayed.

2 Press the AIR button and select “START”, then press the MODE button.

The LCD lights up completely and will move to the measurement start screen.

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7-2-6. Auto calibration cylinder setting This section describes how to set gas groups (cylinders) for calibration. Five cylinders can be set as A to E.

1 Press the AIR button to select “AUTO CAL”, then press the MODE button. The auto calibration screen is displayed.

2 Press the AIR button and select “CYL SEL”, then press the MODE button. Pressing the AIR button displays the gas type and concentration for cylinders A to E in sequence.

3 Press the AIR button. Pressing the AIR button displays the detection target gas in sequence. Pressing the AIR button once more displays “ESCAPE” and returns the display to the screen in Step 1.

4 Press the MODE button on the sensor selection screen for changing cylinder settings.

5 Press the AIR button to select a cylinder from A to E, then press the MODE button. “END” appears and the display returns to the screen shown in the step 3 returns automatically..

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7-2-7. Auto calibration gas concentration selection This section describes how to select the calibration gas concentration for the individual sensors. Calibration gas concentration can be set in one-digit units within the setting range. <Calibration gas concentration setting range>

Detection target gas Sensor model Calibration gas 1 digit Lower limit Upper limit

Combustible gas (HC) NCR-6309 Isobutane (i-C4H10) 1 %LEL 5 %LEL 75 %LEL

Combustible gas (CH4) NCR-6309 Methane (CH4) 1 %LEL 5 %LEL 75 %LEL

Hydrogen sulfide (H2S） ESR-A1DP or

ESR-A13i Hydrogen sulfide

(H2S） 0.1 ppm 1.0 ppm 200.0 ppm

Oxygen (O2) ESR-X13P Oxygen (O2) 0.1 vol% 0.0 vol% 18.0 vol%

Carbon monoxide (CO) ESR-A1DP, ESR-

A1CP, or ESR-A13P

Carbon monoxide (CO)

1 ppm 20 ppm 2,000 ppm

Carbon monoxide (CO) ESR-A1CP Hydrogen (H2) 1 ppm 25 ppm 2,000 ppm * CO(-H2) calibration should be performed using single gas and not as a mixture of CO and H2. * Hydrogen must be calibrated in the range from 10 °C to 30 °C.

1 Press the AIR button to select “AUTO CAL”, then press the MODE button. The auto calibration screen is displayed.

2 Press the AIR button to select “CAL-P”, then press the MODE button.

3 Press the AIR button to select the calibration gas type. Pressing the AIR button displays the detection target gas in sequence.

Pressing the AIR button once more displays “ESCAPE” and returns the display to the screen in Step 1.

4 Press the MODE button on the sensor selection screen for changing calibration gas concentrations. The calibration concentration change screen is displayed.

5 Press the AIR button to select the calibration concentration, then press the MODE button. “END” appears and the display returns to the screen shown in the step 3 returns automatically..

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7-3. Bump test The product includes a function for performing a bump test (function check).

7-3-1. Perform bump test (BUMP TEST) A bump test can be performed for gas types selected from cylinders A to E. Prepare a bump test gas in the same way as for the calibration gas (P. 63).

1 Press the AIR button on the user mode menu to select “BUMP”, then press the MODE button. The bump test screen is displayed.

2 Press the AIR button to select the cylinder for the bump test, then press the MODE button. Introduce the gas for the bump test. The bump test is performed.

If calibration is specified to be performed after a bump test fails, calibration will be automatically performed if the bump test fails. After the bump test and calibration are completed, the bump test results (left), calibration results (right) are displayed together with the readings at the bump test and after calibration.

“P”: Passed, “F”: Failed

(Only those calibrated are displayed.)

3 Press the MODE button. “END” appears and the display returns to the measurement start screen.

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7-3-2. Switching from bump test (BUMP TEST) to measurement start screen

This section explains how to switch from bump test screen to measurement start screen.

1 Press the AIR button and select “BUMP”, then press the MODE button. The bump test screen is displayed.

2 Press the AIR button and press “START” button.


The LCD lights up completely and will move to the measurement start screen.

CAUTION For models with a combustible gas sensor installed, the screen shown on

the right may be displayed if calibration is performed after a bump test failure. If this screen is displayed, some combustible gases cannot be converted using the combustible gas conversion function. For information on the types of gases that cannot be converted, see “6-2-2. Combustible conversion gas selection”. If the screen shown on the right is displayed, replace the combustible gas sensor with a new one promptly.

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7-4. Cleaning instructions Clean the product if it becomes excessively dirty. Be sure to turn off the power before cleaning, and wipe clean using a rag or cloth soaked in water and firmly wrung out. Do not clean using water, organic solvents or commercially available cleaners for cleaning, as these may cause the product to malfunction. NOTE Water may remain in the buzzer sound opening or grooves after the product has got wet. Remove

any moisture as follows: ① Wipe away moisture on the product thoroughly using a dry towel or cloth. ② Hold the product firmly and shake it about ten times with the buzzer sound opening facing

downward. ③ Wipe away moisture escaping from the inside thoroughly using a towel or cloth. ④ Place the product on a dry towel or cloth and allow it to stand at room temperature.

CAUTION When wiping the product clean, do not splash water on it or use organic solvents like alcohol and

benzine or commercially available cleaners. These may discolor or damage the surface of the product, or cause the sensors to malfunction.

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7-5. Parts replacement

7-5-1. Periodic replacement parts The consumable parts of the product are listed below. Consumable parts should be replaced using the recommended replacement intervals as a guide.

<Recommended replacement parts list>

Name Recommended check interval

Recommended replacement

interval Quantity Remarks

Combustible gas sensor (NCR-6309)

6 months 3 years 1 *

O2 sensor (ESR-X13P) 6 months 3 years 1 *

CO/H2S sensor (ESR-A1DP)

6 months 3 years 1 *

CO sensor (ESR-A13P) 6 months 3 years 1 *

CO sensor (ESR-A1CP) 6 months 3 years 1 *

H2S sensor (ESR-A13i) 6 months 3 years 1 *

Dust filter Before and after use

6 months or when contaminated

1 Part No.: 4777 9343 10 10-sheet set

Interference gas removal filter

3 months 6 months 1

For combustible gas sensor (NCR-6309) Part No.: 4777 9315 90 5-sheet set


3 months 6 months 1

For CO/H2S sensor (ESR-A1DP) Part No.: 4777 9314 10 5-sheet set


3 months 6 months 1

For CO sensor (ESR-A1CP, ESR-A13P) Part No.: 4777 9316 60 5-sheet set


3 months 6 months 1 For H2S sensor (ESR-A13i) Part No.: 4777 9317 30 5-sheet set

Rubber seals - 3 to 6 years 1 set *

Battery - Approx. 500

charging/discharging cycles

1 *

* A functional check by a qualified service engineer is required after replacement. To ensure safety and the

stable operation of the product, request checking by a qualified service engineer. Contact Riken Keiki to request checking. NOTE The above replacement intervals are guidelines only. Replacement intervals may vary depending on

actual operating conditions. These intervals do not constitute warranty periods. Replacement intervals may vary depending on the results of regular maintenance.

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7-5-2. Filter replacement The dust filter and interference gas removal filters are consumables. Check the extent of contamination and replace them regularly.

<Dust filter replacement procedure> 1 Loosen the two screws on the

underside of the main unit and release the two tabs.

2 Detach the sensor cap and replace the dust filter with a new one.

3 Reattach the sensor cap and press it until the two tabs click into place.

4 Tighten the screws to secure the sensor cap.

Sensor cap

Dust filter

Screws

Tabs

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<Interference gas removal filter replacement> 1 Loosen the two screws

on the underside of the main unit and release the two tabs.

2 Remove the sensor cap, dust filter, and interference gas removal filters in sequence, and replace the interference gas removal filters.

3 Reseat the dust filter in its original position.

4 Reattach the sensor cap and press it until the two tabs click into place.

5 Tighten the screws to secure the sensor cap.

WARNING Install the dust filter correctly. Product performance cannot be guaranteed if it is misaligned. Replace the filter every six months. Replace the filter whenever it becomes contaminated even if it

is less than six months. When replacing the dust filter or interference gas removal filters, follow the procedure described in

“Filter replacement”, tighten the screws securely, and make sure that the two tabs on the filter cap are securely engaged. If the screws are loose or the tabs of the sensor cap are not securely engaged, foreign matter may get inside the product. Foreign matter may also get in if even minute particles are caught between the contact surfaces.

Do not damage the rubber seal. To maintain performance, we recommend replacing all of the rubber seals every three to six years,

regardless of condition. Be sure to use only dust filters and interference gas removal filters specifically intended for use

with the product (GX-3R). Use of non-approved parts may adversely affect gas detection performance and allow water to get inside the product.

Sensor cap

Dust filter

Sensor Sensor

Sensor

Intereference gasremoval filter

Screws

Tabs

Sensor cover


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WARNING Install the individual interference gas removal filters correctly. If they are misaligned, gas may leak,

preventing correct detection. Install the dust filter correctly. Product performance cannot be guaranteed if it is misaligned. Replace the filter every six months. Replace the filter whenever it becomes contaminated even if it

is less than six months. When replacing the dust filter or individual interference gas removal filters, follow the procedure

described in “Interference gas removal filter replacement”, tighten the screws securely, and make sure that the two tabs on the sensor cap are securely engaged. If the screws are loose or the tabs of the sensor cap are not securely engaged, foreign matter may get inside the product. Foreign matter may also get in if even minute particles are caught between the contact surfaces.

Do not damage the rubber seal. To maintain performance, we recommend replacing all rubber seals every three to six years,

regardless of condition. Be sure to use only dust filters and interference gas removal filters specifically intended for use

with the product (GX-3R). Use of non-approved parts may adversely affect gas detection performance and allow water to get inside the product.

Use only the dedicated interference gas removal filter for each sensor. Otherwise gas may not be detected correctly.

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8

8 Storage and Disposal

8-1. Procedures for storage or when not in use for extended periods

The product must be stored in the following environment: ・ In a dark location at normal temperature and humidity away from direct sunlight ・ In a location free of gases, solvents, and vapors Store the product in its shipping carton if this has been retained. If the shipping carton is not available, store away from dust and dirt. NOTE If the product is not to be used for extended periods, we recommend storing after the battery is

discharged until the battery level icon shows one bar. Storing while fully charged may reduce battery life and accelerate battery deterioration.

8-2. Procedures for use after storage Perform calibration if the product is used again after a period in storage.

CAUTION Contact Riken Keiki to request readjustment and gas calibration. If there is a temperature difference of 15 °C or more between the storage and usage locations, turn

on the power and allow the product to stand for about 10 minutes in a similar environment to the usage location to acclimatize before performing air calibration in fresh air.

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8-3. Product disposal Dispose of the product as industrial waste (incombustible) in accordance with local regulations.

<Disposal in EU member states> When disposing of the product in an EU member state, separate the battery as specified. The battery removed from the lithium ion battery unit must be handled in accordance with waste sorting and collection or recycling systems stipulated by the regulations of EU member states.

NOTE Crossed-out recycle dustbin mark This pictogram is affixed to products which contain batteries that fall under

EU Battery Directive 2006/66/EC. Such batteries need to be disposed of as specified by the latest directive. This pictogram indicates that the batteries need to be separated from ordinary waste and disposed of appropriately.

WARNING Never attempt to disassemble electrochemical type sensors, as they contain electrolyte.

Electrolyte may cause inflammation if it comes into contact with the skin and may cause blindness if it comes into contact with the eyes. Electrolyte may discolor or decompose clothing if it comes into contact with clothing. If contact occurs, rinse the area immediately with plenty of water. Dispose of batteries in accordance with procedures specified by local authorities.

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9

9 Troubleshooting

This troubleshooting chapter does not cover the causes of all possible product malfunctions. It provides brief explanations to assist in determining the causes of common problems. If you encounter symptoms not addressed here or if problems persist even after taking corrective action, contact Riken Keiki.

9-1. Product abnormalities

Symptoms <Screen display>

Cause Action

The power cannot be turned on.

The battery is depleted. Charge the battery in a safe place at ambient temperatures between 0 °C and +40 °C.

The POWER button was pressed for too short or too long a time.

To turn on the power, press the POWER button until the buzzer blips, and then release the button.

Abnormal operation Disturbances due to sudden static electricity noise, etc.

Turn off the power once, and then turn it back on again.

Low battery voltage alarm indication <FAIL BATTERY>

Battery levels are low. Turn off the power, and charge the battery in a safe place at ambient temperatures between 0 °C and +40 °C.

The power turns off immediately when it is turned on. <TURN OFF>

Battery levels are low. Turn off the power, and charge the battery in a safe place at temperatures between 0 °C and +40 °C.

Air calibration is not possible. <FAIL SENSOR>

The product is not surrounded by fresh air.

Provide fresh air.

The sensor sensitivity has degraded.

Contact Riken Keiki to request sensor replacement.

Bump testing is not possible.

The bump test gas concentration setting differs from the concentration of the bump test gas supplied.

Check to confirm that the bump test gas concentration setting matches the concentration of the bump test gas supplied.



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Span adjustment is not possible. <FAIL SENSOR>

The calibration gas concentration setting differs from the concentration of the calibration gas supplied.

Check to confirm that the calibration gas concentration setting matches the concentration of the gas supplied.

Indication value decrease due to a dry environment. (only for ESR-A1CP H2)

Allow the unit to stand overnight or more in an environment with sufficient humidity and then perform gas calibration again.



Symptoms

<Screen display> Cause Action

A sensor abnormality is indicated in measurement mode.

<FAIL SENSOR>


Contact Riken Keiki to request sensor replacement. (If “FAIL” appears in place of a measured value when the power is turned on, press the MODE button to reset the alarm. The gas sensors other than the faulty sensor can still be used.)

System abnormality <FAIL SYSTEM>

A circuit abnormality occurred in the main unit.

Contact Riken Keiki for repair.

Error No. 000 Internal ROM abnormality

Error No. 010 Internal RAM abnormality

Error No. 021 Internal FRAM abnormality

Error No. 031 FLASH abnormality

Error No. 081 PCB abnormality

Error No. 082 Temperature sensor abnormality

Clock abnormality <FAIL CLOCK>

Internal clock abnormality

Set the date and time. (P. 58) If this symptom occurs frequently, the internal clock may be faulty and must be replaced. Contact Riken Keiki.

Cannot access user mode.

Forgot user mode password. Contact Riken Keiki.

The charge LED flashes alternately green and orange.

The temperature is outside the allowable charging temperature range.

Charge at ambient temperatures between 0 °C and +40 °C.

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9-2. Reading abnormalities

Symptoms <Screen display>

Cause Action

The reading rises (or drops) and remains unchanged.

Sensor drift Perform air calibration.

Presence of interference gases

It is difficult to completely eliminate the effects of interference gases. Contact Riken Keiki for information on countermeasures, such as interference gas removal filters.

Slow leakage

They may be a very small leakage (slow leakage) of the detection target gas. Leaving this unresolved may lead to dangerous situations. Take the same action as for gas alarms.

Environmental fluctuations Perform air calibration.

A gas alarm is triggered even though there is no problem in the measuring environment.

Presence of interference gases

It is difficult to completely eliminate the effects of interference gases. Contact Riken Keiki for information on countermeasures, such as interference gas removal filters.

Effects of noise

Turn off the power once, and then turn it back on again (restart). If similar symptoms recur frequently, take appropriate measures to address the noise source.

Slow response

Dust filter clogging Replace the dust filter.



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10

10 Product Specifications

10-1. Specifications list <Common specifications> Concentration display

LCD digital (7 segments + 14 segments + icons)

Detection method Diffusion type

Displays Clock, battery level, operation status

Buzzer volume Approx. 95 dB (mean value at 30 cm)

Gas alarm indication

Lamp flashing, continuous modulating buzzer sounding, gas concentration display blinking, vibration

Gas alarm pattern Self-latching

Fault alarm/self diagnosis

System abnormality, sensor abnormality, battery voltage drop, calibration failure

Fault alarm indication

Lamp flashing, intermittent buzzer sounding, detail display

Fault alarm pattern Self-latching

Transmission specifications

IrDA (for data logger)

Power source Lithium ion battery

Continuous operating time

Approx. 40 hours (long-life battery mode ON, 25 °C, no alarm, no lighting) Approx. 25 hours (long-life battery mode OFF, 25 °C, no alarm, no lighting)

Operating temperature range

Temporary use environment: -40 °C to +60 °C (no sudden changes) Continuous use environment: -20 °C to +50 °C (no sudden changes)

Operating humidity range

Temporary use environment: 0 %RH to 95 %RH (no condensation) Continuous use environment: 10 %RH to 90 %RH (no condensation)

Operating pressure range

80 kPa to 120 kPa (80 kPa to 110 kPa for explosion-proof range)

Construction Dustproof, splash-proof construction equivalent to IP66/68 (2 m, 1 h); drop resistant to 7 m

Explosion-proof construction

General ATEX/IECEx specification: Intrinsically safe explosion-proof construction and flame-proof enclosures

Japan Ex specification: Intrinsically safe explosion-proof construction

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Explosion-proof class

ATEX II1G Ex da ia IIC T4 Ga / IM1 Ex da ia I Ma ( With combustible gas sensor) II1G Ex ia IIC T4 Ga / IM1 Ex ia I Ma ( No combustible gas sensor) IECEx Ex da ia IIC T4 Ga / Ex da ia I Ma ( With combustible gas sensor) Ex ia IIC T4 Ga / Ex ia I Ma ( No combustible gas sensor) Japan Ex Ex ia IIC T4 Ga

External dimensions

Approx. 58 mm (W) × 65 mm (H) × 26 mm (D) (excluding projections)

Weight Approximately 100 g

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<Individual sensor specifications>

Item Detection target gas

Combustible gas

Isobutane (i-C4H10) or Methane (CH4)*

Detection range 0 to 100 %LEL

1 digit 1 %LEL


1st alarm: 10 %LEL 2nd alarm: 25 %LEL 3rd alarm: 50 %LEL

OVER alarm: 100 %LEL


1st alarm: 10 %LEL 2nd alarm: 50 %LEL 3rd alarm: 50 %LEL

OVER alarm: 100 %LEL Detection principle New ceramic type * The factory default setting is either CH4 or HC (specified in the order).

Item Detection target gas

Oxygen (O2) Carbon monoxide

(CO) Hydrogen sulfide

(H2S）

Measuring range (General ATEX/IECEx specification)

0 to 25.0 % 0 to 500 ppm 0 to 100.0 ppm

Service range (General ATEX/IECEx specification)

25.1 to 40.0 % 501 to 2,000 ppm 100.1 to 200.0 ppm

Measuring range (Japan Ex specification)

0 to 25.0 % 0 to 500 ppm 0 to 30.0 ppm

Service range (Japan Ex specification)

25.1 to 40.0 % 501 to 2,000 ppm 30.1 to 200.0 ppm

1 digit 0.1 % 1 ppm 0.1 ppm


L: 19.5 % LL: 18.0 % H: 23.5 %

OVER alarm: 40.0 %

1st：25 ppm 2nd：50 ppm

3rd：1200 ppm TWAalarm：25 ppm

STELalarm：200 ppm OVERalarm：2000 ppm

1st：5.0 ppm 2nd：30.0 ppm 3rd：100.0 ppm

TWAalarm：1.0 ppm STELalarm：5.0 ppm

OVERalarm：200.0 ppm


L: 18.0 % LL: 18.0 % H: 25.0 %

OVER alarm: 40.0 %

1st：25 ppm 2nd：50 ppm 3rd：50 ppm

TWAalarm：25 ppm STELalarm：200 ppm

OVERalarm：2000 ppm

1st：1.0 ppm 2nd：10.0 ppm 3rd：10.0 ppm

TWAalarm：1.0 ppm STELalarm：5.0 ppm

OVERalarm：200.0 ppm Detection principle Electrochemical type

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10-2. Accessory list Standard accessories (general ATEX/IECEx specification)

Part name Part number Hand strap 0888 0605 90 Belt clip (with attachment screw) 4777 9202 40 Rubber protection cover 4777 4161 10 AC adapter 2594 0898 30 EU plug 2594 0933 60 Calibration adapter (simple type) 4777 9307 40

Standard accessories (Japan Ex specification)

Part name Part No. Hand strap 0888 0605 90 Belt clip (with attachment screw) 4777 9202 40 Rubber protection cover 4777 4161 10 AC adapter 2594 0898 30

<Optional items (sold separately)>

Part name Part No. Belt clip (with attachment screw) 4777 9202 40 Ultra-slim alligator clip (with attachment screw) 4777 9203 10 Belt assembly (with attachment fixture and screw) 4777 9293 30 Filter unit set (for ESR-A1DP) 5-sheet set 4777 9314 10 Filter unit set (for NCR-6309) 5-sheet set 4777 9315 90 Filter unit set (for ESR-A1CP, ESR-A13P) 5-sheet set 4777 9316 60 Filter unit set (for ESR-A13i) 5-sheet set 4777 9317 30 Dust filter 10-sheet set 4777 9343 10 Protective film 5-sheet set 4777 9296 50 Leather case 4777 4257 00 Heat-resistant case (not explosion-proof) 4777 4259 40 Manual suction kit (with sampling rod) 4777 9302 80 Manual suction kit (with float) 4777 9304 20 Manual suction kit (with weighted 30 m tube) 4777 9305 00 AU plug 2594 0932 90 EU plug 2594 0933 60 UK plug 2594 0934 30 Calibration adapter (simple type) 4777 9307 40 Calibration adapter 4777 9309 90 Charging cradle (BC-3R) BC-3R 00 Charging cradle wall-mounting fixture 4777 4337 50 5-unit charging cable w/o AC adapter (cable length: 22.5cm) 4777 9329 70 5-unit charging cable w/o AC adapter (cable length: 60cm) 4777 9319 80 5-unit charging cable w/o AC adapter (cable length: 120cm) 4777 9333 20 Data logger management program (SW-GX-3R(EX)) 2980 6228 10

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11

11 Appendix

Data logger function The product is equipped with a data logger function that records measurement results and events such as gas alarms, fault alarms, and calibration. NOTE The data logger management program (sold separately) is required to check data recorded using

the data logger function. Contact Riken Keiki for more information. The data logger provides the following five functions:

(1) Interval trend Records the changes in measured concentration from when the power is turned on until it is turned off. For combustible gases, carbon monoxide, and hydrogen sulfide, the average value, peak value, and peak value detection time are recorded; for oxygen, the average value, minimum value, minimum value detection time, maximum value, and maximum value detection time are recorded. Records data for the 3,600 most recent items. If the number of items exceeds 3,600, the oldest data will be overwritten by the latest data. If overwriting is disabled, recording stops when 3,600 is exceeded. If 3,600 items are recorded for a single measurement, the oldest data will not be overwritten, and recording will stop even if overwriting is enabled. * However, if the maximum recording time is exceeded, the oldest data will be deleted before reaching

3,600. The maximum recording times corresponding to different intervals are as follows:

Interval 10 seconds 20 seconds 30 seconds 1 minute 3 minutes 5 minutes 10 minutes

Maximum recording time

10 hours 20 hours 30 hours 60 hours 180 hours 300 hours 600 hours

* The standard interval is 5 minutes. The interval can be set using the Data Logger Management Program (sold separately).

(2) Alarm trend When an alarm is triggered, this function records the changes in measured concentration for 30 minutes before and after the alarm occurred (one hour in total). Alarm trend records PEAK values (minimum values for oxygen) over 5-second periods at 5-second intervals. Records data for the eight most recent items. If the number of items exceeds eight, the oldest data will be overwritten by the latest data.

(3) Alarm event Records alarm occurrences as events. This function records the time the alarm was triggered, the measurement target gas, and the type of alarm event. Records the 100 most recent events. If the number of events exceeds 100, the oldest data will be overwritten by the latest data.

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(4) Trouble event Records fault alarm occurrences as events. This function records the time when the fault alarm was triggered, the measurement target gas, device information, and the type of trouble event. Records the 100 most recent events. If the number of events exceeds 100, the oldest data will be overwritten by the latest data.

(5) Calibration history Records data when calibration is performed. This function records calibration time, concentration values before and after calibration, and calibration errors. Records data for the 100 most recent calibrations. If the number of calibrations exceeds 100, the oldest data will be overwritten by the latest data. NOTE Communication mode starts automatically if the infrared communication port of the product is

positioned where IrDA communication is available while the date and time or battery level/gas alarm pattern are displayed after the power is turned on. You can also enter communication mode by pressing the AIR and POWER buttons at the same time with the infrared communication port of the product positioned where IrDA communication is available.

A fault alarm will be triggered if no communication connection can be confirmed for a preset duration in communication mode. If this occurs, either repeat the communication connection or turn off the power for the product.

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100 %LEL = ppm conversion list The following table shows the standard conversion for 100 %LEL and ppm:

Standard IEC ISO

Methane CH4 50,000 ppm 44,000 ppm 44,000 ppm

Isobutane i-C4H10 18,000 ppm 13,000 ppm 15,000 ppm

Hydrogen H2 40,000 ppm 40,000 ppm 40,000 ppm

Methanol CH3OH 55,000 ppm 60,000 ppm 60,000 ppm

Acetylene C2H2 15,000 ppm 23000 ppm 23000 ppm

Ethylene C2H4 27,000 ppm 23,000 ppm 24,000 ppm

Ethane C2H6 30,000 ppm 24,000 ppm 24,000 ppm

Ethanol C2H5OH 33,000 ppm 31,000 ppm 31,000 ppm

Propylene C3H6 20,000 ppm 20,000 ppm 18,000 ppm

Acetone C3H6O 21,500 ppm 25,000 ppm 25,000 ppm

Propane C3H8 20,000 ppm 17,000 ppm 17,000 ppm

Butadiene C4H6 11,000 ppm 14,000 ppm 14,000 ppm

Cyclopentane C5H10 14,000 ppm 14,000 ppm 14,000 ppm

Benzene C6H6 12,000 ppm 12,000 ppm 12,000 ppm

N-hexane n-C6H14 12,000 ppm 10,000 ppm 10,000 ppm

Toluene C7H8 12,000 ppm 10,000 ppm 10,000 ppm

N-heptane n-C7H16 11,000 ppm 8,500 ppm 8,000 ppm

Xylene C8H10 10,000 ppm 10,000 ppm 10,000 ppm

N-nonane n-C9H20 7,000 ppm 7,000 ppm 7,000 ppm

Ethyl acetate EtAc 21,000 ppm 20,000 ppm 20,000 ppm

Isopropyl alcohol IPA 20,000 ppm 20,000 ppm 20,000 ppm

Methyl ethyl ketone MEK 18,000 ppm 15,000 ppm 15,000 ppm

Methyl methacrylate MMA 17,000 ppm 17,000 ppm 17,000 ppm

Dimethyl ether DME 30,000 ppm 27,000 ppm 27,000 ppm

Methyl isobutyl ketone

MIBK 12,000 ppm 12,000 ppm 12,000 ppm

Tetrahydrofuran THF 20,000 ppm 15,000 ppm 15,000 ppm

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Revision or Abolition History

Edition Revision Issue date

0 First issue 2019/2/27

1 Words added 2019/3/7

2 Clerical corrections 2019/3/22

3 Clerical corrections, Words added 2019/4/11

4 Clerical corrections 2019/5/8

5 Add item 2019/7/1

6 Clerical corrections, 2-4/5-3/6-4/7-2 corrections 2019/10/10

7 Clerical corrections, change dust filter, add standard accessory 2019/12/1

8 Clerical corrections, update Declaration of Conforminty 2020/4/1

9 Change MOVER alarm, 6-2-2 add JG specification 2020/5/19

10 TYPE L and TYPE M added 2020/6/10

11 Update Safety information, Declaration of Conforminty 2020/8/1

12 Add 2-2 Warning information, update Safety information, Declaration of Conforminty

2020/8/21

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GX-3R Operating Manual (PT0-164) · 1) RP-3R Pump unit Operating Manual (PT0E-166) 2) SW-GX-3R Data Logger Management Program Software Operating Manual (PT0E-178) 3) SDM-3R Docking

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